Three-dimensional ion transport networks and current collectors for electrochemical cells

ABSTRACT

Provided herein are three-dimensional ion transport networks and current collectors for electrodes of electrochemical cells. Exemplary electrodes include interconnected layers and channels including an electrolyte to facilitate ion transport. Exemplary electrodes also include three dimensional current collectors, such as current collectors having electronically conducting rods, electronically conducting layers or a combination thereof.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of and priotiy to U. S. ProvisionalApplication Nos. 62/262,185, filed Dec. 2, 2015, 62/326,164, filed Apr.22, 2016; 62/346,712, filed Jun. 7, 2016; 62/350,822, filed Jun. 16,2016; 62/324,718, filed Apr. 19, 2016; 62/346,272, filed Jun. 6, 2016;and 62/415,201, filed Oct. 31, 2016, each of which is herebyincorporated by reference in its entirety.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

This invention was made with government support under Grant No.DE-EE0006851 awarded by the Department of Energy. The government hascertain rights in the invention.

BACKGROUND

Over the last few decades revolutionary advances have been made inelectrochemical storage and conversion devices expanding thecapabilities of these systems in a variety of fields including portableelectronic devices, air and space craft technologies, passenger vehiclesand biomedical instrumentation. Current state of the art electrochemicalstorage and conversion devices have designs and performance attributesthat are specifically engineered to provide compatibility with a diverserange of application requirements and operating environments. Forexample, advanced electrochemical storage systems have been developedspanning the range from high energy density batteries exhibiting verylow self-discharge rates and high discharge reliability for implantedmedical devices to inexpensive, light weight rechargeable batteriesproviding long runtimes for a wide range of portable electronic devicesto high capacity batteries for military and aerospace applicationscapable of providing extremely high discharge rates over short timeperiods.

Despite the development and widespread adoption of this diverse suite ofadvanced electrochemical storage and conversion systems, significantpressure continues to stimulate research to expand the functionality ofthese systems, thereby enabling an even wider range of deviceapplications. Large growth in the demand for high power portableelectronic products, for example, has created enormous interest indeveloping safe, light weight primary and secondary batteries providinghigher energy densities. In addition, the demand for miniaturization inthe field of consumer electronics and instrumentation continues tostimulate research into novel design and material strategies forreducing the sizes, masses and form factors of high performancebatteries. Further, continued development in the fields of electricvehicles and aerospace engineering has also created a need formechanically robust, high reliability, high energy density and highpower density batteries capable of good device performance in a usefulrange of operating environments.

Many recent advances in electrochemical storage and conversiontechnology are directly attributable to discovery and integration of newmaterials for battery components. Lithium battery technology, forexample, continues to rapidly develop, at least in part, due to thediscovery of novel electrode and electrolyte materials for thesesystems. The element lithium has a unique combination of properties thatmake it attractive for use in an electrochemical cell. First, it is thelightest metal in the periodic table having an atomic mass of 6.94 AMU.Second, lithium has a very low electrochemical oxidation/reductionpotential (i.e., −3.045 V vs. NHE (normal hydrogen referenceelectrode)). This unique combination of properties enables lithium basedelectrochemical cells to have very high specific capacities. State ofthe art lithium ion secondary batteries provide excellentcharge-discharge characteristics, and thus, have also been widelyadopted as power sources in portable electronic devices, such ascellular telephones and portable computers. U.S. Pat. Nos. 6,852,446,6,306,540, 6,489,055, and “Lithium Batteries Science and Technology”edited by Gholam-Abbas Nazri and Gianfranceo Pistoia, Kluer AcademicPublishers, 2004, are directed to lithium and lithium ion batterysystems which are hereby incorporated by reference in their entireties.

Advances in electrode structure and geometry have also recentlydeveloped. For example, U.S. Patent Application Publication US2011/0171518 (Dunn) and International Patent Application publication WO2010/007579 (Verhaegh) disclose three-dimensional battery structure forsolid-state lithium ion batteries. U.S. Pat. No. 7,553,584 and U.S.Patent Application Publication US 2003/0099884 (Chiang) disclosebatteries in which the electrodes are formed as complementarystructures. U.S. Patent Application Publications US 2012/0077095 and2013/018959 (Roumi) describe three-dimensional electrode structures.Japanese Patent Application Publication 2006-286427 describes electrodeplates containing an internal conductive layer; conduction passagesbetween the internal conductive layer and the charge collector are alsoshown.

BRIEF SUMMARY OF THE INVENTION

In a first aspect, provided are layered electrodes including athree-dimensional network which provides a low resistance diffusion pathfor ions inside the electrode. In embodiments the layered electrodecomprises a plurality of layers comprising an active material. Further,at least one layer comprising electrolyte is disposed between two layerscomprising an active material. For example, a three dimensional networkfor ion transport through electrolyte is formed by the layer(s)comprising electrolyte and electrolyte containing conduits through thelayers comprising an active material.

In some embodiments each layer comprising an active material isseparated from each adjacent layer comprising an active material by alayer comprising an electrolyte. In other embodiments, a group of layerscomprising an active material is separated from another layer comprisingan active material or a group of layers comprising an active material bya layer comprising an electrolyte.

FIG. 1A illustrates an electrochemical cell (1) including anode (10),cathode (20) and separator (30) disposed between the anode and thecathode. Adjacent anode layers comprising an active material (12) areseparated by layers comprising electrolyte (16). Similarly, adjacentcathode layers comprising an active material (22) are separated bylayers comprising electrolyte (26). Electrolyte-containing conduits inthe anode (14) and similar conduits in the cathode (24) are also shown.FIG. 1B shows a top view of the cell and illustrates an exemplarydistribution of electrolyte-containing conduits (14) in a layercomprising an active material (12). FIG. 2B illustrates a top view ofdifferently shaped conduits in the forms of slots extending across thewidth of the electrode (14). In a given electrode, theelectrolyte-containing conduits and the layers comprising anelectrolyte, which are in ionic communication, form a three dimensionalnetwork for ion transport.

A variety of active materials are suitable for use in the electrodelayers. In some embodiments, the cathode active material is selectedfrom the group consisting of lithium metal oxides and lithium metalphosphates. In additional embodiments, the anode active material isselected from the group of carbon, silicon, tin, aluminum, germanium orlithium titanate. In embodiments, the thickness of each of the layerscomprising an active material is from 10 μm to 150 μm.

In embodiments, the layer comprising electrolyte comprises a solidelectrolyte, a gel electrolyte or a liquid electrolyte in a porousspacer material. Solid electrolytes include ceramic and polymerelectrolytes. Porous spacer materials include, but are not limited topolymers or metals in porous or mesh form. As an example, the thicknessof the spacer is from 0.5 μm to 25 μm thick. In some embodiments, aspacer of this aspect comprises polyethylene, polypropylene, cellulose,pvdf, polyester, PET, polyimides and any combinations thereof.

In embodiments, each electrolyte-containing conduit comprises anelectrolyte or an electrolyte in a carrier material filling aperforation or through-hole in the active material layer. As an example,the carrier material is a porous material that does not function as anelectrode in the cell. Suitable electrolytes for use with a carrierinclude liquid electrolytes. Solid or gel electrolytes need not be usedwith a carrier. In embodiments, the perforation or through-hole is“filled” with the electrolyte or electrolyte in a carrier material when75% to 100%, 80% to 100%, 90% to 100% or 95% to 100% of the volume ofthe perforation or through-hole is filled. In further embodiments, eachlayer comprising an active material comprises a plurality ofelectrolyte-containing conduits. As examples, the electrolyte-containingconduits are randomly or periodically spaced over the layer comprisingan active material. When the electrolyte-containing conduits areperiodically spaced the conduits of adjacent layers may be aligned witheach other or not. In some embodiments each electrolyte-containingconduit is characterized by a longitudinal axis and conduits of adjacentlayers are aligned when the longitudinal axes of the conduits arealigned. The electrolyte-containing conduits are in ionic communicationwith the layer(s) comprising additional electrolyte. In some embodimentsthe diameter or characteristic width of the conduits are from 0.5 μm to500 μm. In further embodiments, the conduits are located from 5 μm to 5mm apart.

A variety of separator materials are known to the art, includingmicroporous separators, nonwovens and polymer electrolytes. Inembodiments, separator comprises one or more electrolytes. Additionalmaterials suitable for use as separators include, solid electrolytelayers that prevent water molecules, CO₂, O₂ or air from transportingthrough the separator system (e.g. LISICON or NASICON). Separatorthicknesses may range, for example, from 10 nanometers to 10 millimetersor optionally from 1 micrometer to 10 micrometers.

In embodiments, the disclosure provides an electrode comprising

-   -   a. a plurality of layers of a first type comprising an active        material, wherein at least two of the layers of the first type        include a plurality of ion-conducting conduits, each ion        conducting conduit having a longitudinal axis and being filled        with an electrolyte or an electrolyte in a porous carrier; and    -   b. at least one layer of a second type comprising additional        electrolyte wherein each layer of the first type is separated        from each adjacent layer of the first type by at least one layer        of the second type;    -   wherein the ion-conducting conduits are in ionic communication        with at least one layer of the second type.

In an embodiment, the longitudinal axes of at least two of theion-conducting conduits in adjacent layers of the first type arealigned, for example, such that they extend along alignment axes thatoverlap or are substantially parallel and/or aligned such thatelectrolyte may pass and/or ions may be transported from one layer toanother. In an embodiment, for example, each of the layers of the firsttype includes a plurality of ion-conducting conduits and theion-conducting conduits are positioned so that the longitudinal axis ofeach ion-conducting conduit is aligned with at least one ion-conductingconduit in an adjacent layer. In an embodiment, for example, each of thelayers of the first type includes an array of ion-conducting conduits,the longitudinal axis of each ion conducting conduit of an individuallayer of the first type is aligned with the longitudinal axis of anion-conducting conduit of each of all the other layers of the first typeand the longitudinal axes of the ion conducting conduits define analignment axis. In an embodiment, for example, each of the layers of thefirst type further includes an aperture, each of the layers of thesecond type includes an aperture, the apertures are aligned to form apassage through the layers of the first type and the layers of thesecond type, an electronically conductive material is located within thepassage and the electrode further comprises a current collector inelectronic communication with the electronically conductive material.

In an embodiment, for example, said electrolyte or said electrolyte in aporous carrier material filling the ion-conducting conduits is a liquidelectrolyte. In an embodiment, for example, said electrolyte filling theion-conducting conduits is a solid or gel electrolyte. In an embodiment,for example, said additional electrolyte of said at least one layer of asecond type is a solid or gel electrolyte or is a liquid electrolyte ina porous spacer material.

In further embodiments, an electrode as disclosed herein furthercomprises layers comprising a current collector, which may also bereferred to as current collector layers. In some embodiments, forexample, the invention provides current collectors having a threedimensional geometry comprising auxiliary current collector elements,such as one or more auxiliary current collector layers, films, plates,rods, segments, or any combination of these. In embodiments eachauxiliary current collector layer is disposed between layers comprisingan active material. Generally these auxiliary current collector layersare secondary to the primary current collector which is connecteddirectly to the battery tab outside the battery cell. In embodimentsthese secondary auxiliary current collector layers are thinner than theprimary current collector. Each current collector layer, includingprimary and auxiliary current collector layers and/or structures iselectronically conductive. Current collectors, such as primary andauxiliary current collectors may comprise a variety of conductivematerials, including but not limited to, metallic materials, carbonmaterials, dopped materials, conductive polymers, conductive alloys, andcombinations thereof. Suitable materials for the current collector layerinclude metals and alloys. In different examples, the current collectorlayer is perforated, a mesh or porous. In some embodiments, thethickness of the current collector layer(s) is less than that of theactive material layers. For example, the thickness of the auxiliarycurrent collector layer or structure is selected from the range of 1 μmto 15 μm. In embodiments, the area of the current collector layer incontact with the adjacent layers comprising an active material isgreater than 30% to less than or equal to 100%, from 40% to 100%, from50% to 100%, from 60% to 100%, from 70% to 100%, from 80% to 100% orfrom 90% to 100% of the area of the adjacent layers comprising an activematerial. In some embodiments the area of the current collector layer isgreater than that of the adjacent layers comprising an active materialin order to facilitate electronic connection to the current collectorlayer. In embodiments the layers comprising an active material areformed by forming a coating comprising the active material or activematerial layer on the auxiliary current collector layer or structure.Alternatively, the invention includes embodiments wherein the auxiliarycurrent collector layer or structure is coated or otherwise formed onthe active material, such as the active material layer.

In some embodiments each layer comprising an active material isseparated from each adjacent layer comprising an active material by alayer comprising an electrolyte or a layer comprising a currentcollector. In other embodiments, a group of layers comprising an activematerial is separated from another layer comprising an active materialor a group of layers comprising an active material by a layer comprisingan electrolyte or a layer comprising a current collector.

In an embodiment, for example, the layers of the first type comprise85%-95% active material. In an embodiment, for example, the layers ofthe first type comprise an LiCoO2 electrode film. In an embodiment, forexample, the layers of the first type further comprise a binder, aconductive material, an electrochemical additive, a structural additiveor any combination thereof. In an embodiment, for example, the layers ofthe first type are characterized by a porosity of 20% to 40%. In anembodiment, for example, the porous carrier material has the samecomposition of the layers of active material and is characterized by aporosity larger than the porosity of the layers of active material. Inan embodiment, for example, the porous carrier material is characterizedby a porosity equal to or greater than 50%.

In an embodiment, for example, at least one, and optionally all, of thelayers of a first type comprises LiCoO₂ electrode film. In anembodiment, for example, at least one, and optionally all, of the layersof a first type comprises 90% LiCo2, 5% carbon black and 5% pvdf binder.In an embodiment, for example, at least one, and optionally all, of thelayers of a first type is characterized by a porosity equal to 30%. Inan embodiment, for example, at least one, and optionally all, of thelayers of a first type 92% active material, 5% carbon black and 3%binder.

In an embodiment, for example, the porous carrier layer comprises 95%TiO₂ or SiO₂ or Al₂O₃ and 5% binder. In an embodiment, for example, theporous carrier layer is characterized by a porosity equal to or greaterthan 50%.

FIG. 3A illustrates an electrochemical cell having a three-dimensionalnetwork for ion transport and also having auxiliary current collectors(28) located within the cathode (20). As illustrated, an ion-conductingchannel (25) is formed through each pair of layers comprising an activematerial (22) having a current collector (28) between them. Asillustrated anode (10) incorporates a current collector (18). Forcomparison, FIG. 3B illustrates a multilayer assembly of anode activelayers, cathode active layers, separators and primary currentcollectors.

In embodiments, an ion conducting channel such as that illustrated inFIG. 3A is formed by aligning ion-conducting conduits through the layerscomprising an active material with apertures in the layer comprising acurrent collector. The ion-conducting channel comprises an electrolyteor an electrolyte in a carrier material filling the channel.

In further embodiments, the disclosure provides an electrode comprising

-   -   a. a plurality of layers of a first type comprising an active        material, wherein at least two of the layers of a first type        include a plurality of ion-conducting conduits, each        ion-conducting conduit having a longitudinal axis and being        filled with an electrolyte or an electrolyte in a porous        carrier;    -   b. at least one layer of a second type comprising additional        electrolyte;    -   c. at least one layer of a third type comprising a current        collector, wherein the current collector is perforated, a mesh        or porous    -   wherein each layer of a first type is separated from each        adjacent layer of a first type by at least one layer of a second        type or at least one layer of a third type and wherein the        ion-conducting conduits are in ionic communication at least one        layer of a second type.

In an embodiment, the longitudinal axes of at least two of the ionconducting conduits in adjacent layers of the first type are aligned,for example, such that they extend along alignment axes that overlap orare substantially parallel and/or such that electrolyte may pass fromone layer to another. In an embodiment, for example, each of the layersof a first type includes a plurality of ion-conducting conduits and theion conducting conduits are positioned so that the longitudinal axis ofeach ion conducting conduit is aligned with at least one ion conductingconduit in an adjacent layer. In an embodiment, for example, each of thelayers of a first type includes an array of ion-conducting conduits andthe longitudinal axis of each ion-conducting conduit of an individuallayer of a first type is aligned with an ion-conducting conduit of eachof all the other layers of a first type. In an embodiment, for example,each of the layers of the first type further includes an aperture, eachof the layers of the second type includes an aperture and each of thelayers of the third type include an aperture, the apertures are alignedto form a passage through the layers of the first type, the second typeand the third type, an electronically conductive material is locatedwithin the passage and the electronically conductive material is inelectronic communication with the at least one layer of a third type.

In additional embodiments at least one passage comprising anelectronically conducting material is present in the electrode inaddition to the ion-conducting conduits or channels, the electronicallyconducting material in the passage being in electronic communicationwith at least one layer comprising a current collector. FIG. 5Aschematically illustrates a cell with passages comprising electronicallyconducting material (15, 17). In different embodiments, theelectronically conducting material is in the form of particles or in theform of a rod or pin.

In further embodiments the passages comprising an electronicallyconducting material are in electronic contact with the primary or maincurrent collector for the electrode, as schematically illustrated byFIG. 5B. Although FIG. 5B illustrates the primary current collectorspositioned parallel to the electrode layers and positioned at the “top”and “bottom” of the multilayer stack, in other embodiments the primarycurrent collectors are positioned on the “sides” of the stack asillustrated in FIG. 4B. In further embodiments, the electrode comprisesa plurality of passages comprising an electronically conducting materialin addition to ion conducting conduits or channels, layers comprising anelectrolyte and layers comprising a current collector as schematicallyillustrated in FIGS. 6A and 6B. In some embodiments, the ratio of thenumber of passages comprising an electronically conducting material tothe number of ion-conducting conduits or channels is from 0.01 to 0.05(e.g. 1% to 5%), from 0.1 to 10 (e.g. 1% to 10%) or from 0.01 to 0.25(e.g. 0.1% to 25%). In embodiments, the electronically conductingmaterial in the passages comprises carbon, electronically conductivepolymer or a metal. Suitable metals include, but are not limited to Al,Cu, Ni, Ti, Fe and alloys thereof. For example, the metal may bestainless steel.

In additional embodiments at least one passage comprising lithium ispresent in the electrode in addition to the ion-conducting conduits orchannels. In some embodiments an electronic connection to the lithium isalso provided. For example, the lithium metal can be used for in situlithiation, prelithiation or lithium deposit. FIG. 5C shows the passagecomprising lithium as being present on the anode side; alternately thepassage comprising lithium is present on the cathode side. In someembodiments, the ratio of the number of passages comprising lithium tothe number of ion-conducting conduits or channels is from 0.01 to 0.5(e.g. 1% to 50%).

In an additional aspect, the disclosure provides a three-dimensionalnetwork which provides a low resistance diffusion path for electronsinside the electrode. For example, a three dimensional network forelectron transport through a current collector assembly is formed by aprimary current collector layer for the electrode and at least oneauxiliary current collector element. In embodiments, the auxiliarycurrent collector element is a plurality of secondary current collectorlayers, a plurality of current collector layer segments, a plurality ofcurrent collector rods or a combination thereof. As referred to herein,a current collector layer segment has a significantly smaller area thatthat of the primary current collector layer or of the secondary currentcollector layer. FIGS. 8A and 8B give an example of the size of acurrent collector segment (78) relative to that of the primary currentcollector (52) while FIG. 8C gives an example of the size of thesecondary current collector layer (28) relative to that of the primarycurrent collector (52). For consistency with FIGS. 9A and 9B theseelements have been labeled as cathode elements. However, in additionalembodiments corresponding elements are found in the anode.

Each current collector layer or current collector segment iselectronically conductive. Suitable materials for the current collectorlayer or current collector segment include metals and alloys. Indifferent examples, the current collector layer or current collectorlayer segment is perforated, a mesh or porous. In examples, the currentcollector layer or current collector layer segment is perforated toproduce apertures for insertion of current collector rods. In someembodiments, the thickness of the current collector layer(s) or currentcollector segment (s) is less than that of the active material layers.For example, the thickness of the current collector layer or currentcollector segment is from 1 μm to 100 μm, optionally for someapplications 1 μm to 15 μm.]

In embodiments, the area of the current collector layer in contact withthe adjacent layers comprising an active material is greater than 30% toless than or equal to 100%, from 40% to 100%, from 50% to 100%, from 60%to 100%, from 70% to 100%, from 80% to 100% or from 90% to 100% of thearea of the adjacent layers comprising an active material. In someembodiments the area of the current collector layer is greater than thatof the adjacent layers comprising an active material in order tofacilitate electronic connection to the current collector layer. Inembodiments the layers comprising an active material are formed byforming a coating comprising the active material on the currentcollector layer.

In embodiments, the area of the current collector layer segment incontact with the adjacent layers comprising an active material isgreater than 1% to less than or equal to 15% or from 5% to 15% of thearea of the adjacent layers comprising an active material. In someembodiments the current collector layer segments are disposed in layerscomprising an electrolyte, as shown in FIGS. 9A and 9B.

FIG. 7A schematically illustrates an electrochemical cell having athree-dimensional network for electron transport. The cathode (20)includes electrode material (72), a plurality of current collectorlayers (28) and a plurality of current collector rods (77). The currentcollector layers are in electronic communication with the currentcollector rods, which in turn are in electronic communication with theprimary current collector layer (52). FIG. 7B schematically illustratesanother cathode having a three-dimensional network for electrontransport. In this cathode the current collector rods (77) do not spanthe electrode material. In both FIGS. 7A and 7B, the plurality ofcurrent collector rods pass through the plurality of current collectorlayers.

In embodiments, the invention provides an electrode comprising:

-   -   a. an electrode material comprising an active material; and    -   b. a current collector assembly comprising        -   i. a primary current collector element, wherein the primary            current collector element is the form of a layer; and        -   ii. at least one auxiliary current collector element            selected from the group consisting of: a plurality of            current collector layers, a plurality of current collector            layer segments, a plurality of current collector rods and            combinations thereof            wherein the at least one auxiliary current collector element            is in electronic communication with the primary current            collector element. In an embodiment, for example, the            primary current collector element is in the form of a sheet            or plate.

In further embodiments, the at least one auxiliary current collectorelement comprises a combination of a plurality of current collector rodsand a plurality of current collector layers, wherein each of theplurality of current collector rods is substantially perpendicular tothe primary current collector element, each of the plurality of currentcollector layers is substantially parallel to the primary currentcollector element, each of the plurality of current collector layerscomprises an plurality of apertures and each of the plurality of currentcollector rods passes through at least one of the apertures of theplurality of current collector layers.

In an embodiment, for example, the auxiliary current collectors areauxiliary thin current collector plates, auxiliary current collectorrods or a combination thereof. In an embodiment, for example, theauxiliary current collector plates are attached with the active materialmix (e.g., a 100 μm layer comprising 90% LiCoO2, 5% carbon black and 5%pvdf binder, having a porosity of 30%-40%, optionally 30%); eitheractive material mix is coated on the auxiliary. current collector plates(e.g., 30% porosity; similar to as in commercial electrode films wherethe current collector is in the middle); or the thin auxiliary currentcollector film may be coated (for example by sputtering or Chemicalvapor deposition or physical vapor deposition) on the solid activematerial mix layer (e.g., a 100 um layer made of 90% LiCoO2, 5% carbonblack and 5% pvdf binder, which is about 30% porous). In this approach,for example, together they form a multilayer film. Stack of themultilayer films with electrolyte between them form an electrode of thisaspect of the invention, where the electronic connectivity between themultilayered film is provided by the auxiliary.=current collector rods.In some embodiments there are auxiliary current collector segments,which are placed between the above multilayer films. In an embodiment, athick, layered electrode may be prepared by stacking commercialelectrodes on top of each other, wherein electrolyte runs in the spacebetween the layers and provides improved ionic connectivity.

In some embodiments, the electrode material comprises an activematerial, a conductive diluent and a binder. In embodiments, theelectrode material comprises a plurality of layers comprising an activematerial, the layers comprising an active material comprising an activematerial, a conductive diluent and a binder. In embodiments, each layercomprising an active material further comprises a plurality of aperturesand each of the plurality of current collector rods passes through atleast one of the apertures of the plurality of layers comprising anactive material. In some embodiments the apertures also guide stackingof the layers comprising an active material on the current collectorrods. In further embodiments, the current collector layer segments areplaced in contact with the layers comprising an active material. In someembodiments the active material and conductive diluent are in powderform; in additional embodiments the binder is also in powder form.

In alternate embodiments, the electrode material comprises a suspensioncomprising an active material, a conductive material and a non-aqueouselectrolyte. For example, the suspension comprises 20% to 75% by volumeof an active material and 0.5% to 8% by volume of a conductive materialin a non-aqueous liquid electrolyte. In embodiments, the active materialand the conductive material are provided as particles. In an embodiment,for example, the conductive material are provided as particlescharacterized by cross section dimensions (e.g. diameter, thickness,etc.) selected from the range of 0.1 μm to 10 μm, and optionally 0.1 μmto 1 μm. As an example, the active material is an anode material or acathode material as described herein. As a further example, theconductive material is a carbon material or a metal. Suitable metalsinclude, but are not limited to Al, Cu, Ni, Ti, Fe and alloys thereof.For example, the metal may be stainless steel. Exemplary non-aqueouselectrolytes are described herein.

In further embodiments, the electrode comprises at least one layercomprising an electrolyte, at least one ion-conducting channel or acombination thereof in addition to a three-dimensional network forelectron transport. FIG. 10 schematically illustrates a cathodeincluding a plurality of secondary current collector layers, a pluralityof current collector rods, and a plurality of ion-conducting channels.

Electrodes of the present invention are versatile and may be used in avariety of electrochemical systems including primary and secondarybatteries. In an embodiment, for example, the electrode of the inventionis an anode or cathode of a Na-ion based battery; an anode or cathode ofa zinc based battery; an anode or cathode of an alkaline battery; ananode or cathode of a lead acid battery; or an anode or cathode of anair based battery.

In an additional aspect, the disclosure provides electrochemical cellsincluding the electrodes described herein. In embodiments, provided isan electrochemical cell comprising: a first electrode including a threedimensional network for ion transport, a three dimensional network forelectron transport, or a combination thereof; a second electrode; and anionically conducting and electronically insulating separator layerdisposed between the first and the second electrode.

In additional embodiments, the disclosure provides an electrochemicalcell comprising

-   -   a. At least one of a first type of multilayered electrode        comprising        -   i. a plurality of layers of a first type comprising a first            active material;        -   ii. at least one layer of a second type comprising an            electrolyte;        -   iii. at least one layer of a third type comprising a current            collector;    -   wherein each layer of a first type is separated from each        adjacent layer of a first type by at least one layer of a second        type or at least one layer of a third type;    -   b. At least one of a second type of multilayered electrode        comprising        -   i. a plurality of layers of a fourth type comprising a            second active material;        -   ii. at least one layer of a second type comprising an            electrolyte;        -   iii. at least one layer of a third type comprising a current            collector;    -   wherein each layer of a fourth type is separated from each        adjacent layer of a fourth type by at least one layer of a        second type or at least one layer of a third type; and    -   c. An ionically conducting and electronically insulating        separator layer disposed between the first and the second        electrode, wherein the layers of the first type of electrode and        the layers of the second type of electrode are substantially        perpendicular to the ionically conducting and electronically        insulating separator layer.

In an embodiment, for example, the first type of multilayered electrodehas a first polarity and the second type of multilayered electrode has asecond polarity. In an embodiment, for example, comprising a pluralityof the first type of multilayered electrodes and a plurality of thesecond type of multilayered electrodes. In an embodiment, for example,each of the layers of the first type of multilayered electrodes and thesecond type of multilayered electrodes are independently provided alonglayer alignment axes that substantially parallel to each other. In anembodiment, for example, the plurality of the first type of multilayeredelectrodes and second type of multilayered electrodes are provided in anorientation substantially parallel to each other. In an embodiment, forexample, the plurality of the first type of multilayered electrodes andsecond type of multilayered electrodes are provided along an electrodealignment axis oriented substantially perpendicular to the layeralignment axes. In an embodiment, for example, a single, continuousseparator is provided between the plurality of the first type ofmultilayered electrodes and the plurality of the second type ofmultilayered electrodes. In an embodiment, the single, continuouselectrode is provided in a wavy form factor, for example wherein Asingle, continuous electrode separates electrode having a positivepolarity from electrodes having a negative polarity.

The disclosure provides electrochemical cells comprising a layeredbattery having a stripe geometry. In an embodiment of this aspect, thelayered battery is capable of bending in a direction normal to the planeof the separator without substantial degradation or mechanical and/orelectrical failure.

The stripe layered battery may be bend or deformed in the directionnormal to the plane of the separator without substantial degradation ormechanical failure. This property is important for consumer electronicsapplication (e.g., watches or wearable electronics, where the bendablebattery can form the wristband or wearable system, providing significantincreased capacity). In an embodiment, the width of each of the anode orcathode stripes is small, for example up to 1 cm, then a 10 cm longbattery of this kind, contains 5 layers of stacked anode and 5 layers ofstacked cathode, can easily bend (e.g., around the wrist) without anydamage to the battery. The thickness of the battery can be for example1.1 mm, each layer of stacked anode or cathode can be 50 um, meaningthat each stacked electrode is made of 20 layers stacked on top of eachother.

In an embodiment, for example, the separator between the anode andcathode can be a single, continuous layer (e.g., celgard) provided in awavy form factor separating more than one set of layers of stacked anodeand cathode regions. (e.g., a Sine wave configuration where the stacksof layered anode and the stacks of layered cathode are separated by thesine wave).

In an additional aspect, the disclosure provides methods for making theelectrodes and electrochemical cells described herein. In someembodiments, the disclosure provides methods for making electrodescomprising a network of 3-dimensional network for ion transport.

In embodiments, the disclosure provides a method for assembling amultilayered electrode, the method comprising the steps of:

-   -   a. Stacking        -   i. a plurality of layers of a first type comprising an            active material; and        -   ii. at least one layer of a second type comprising a spacer            material or a solid or gel electrolyte, wherein each layer            of the first type is separated from each adjacent layer of            the first type by at least one layer of the second type;    -   b. When a carrier material, a spacer material or a carrier        material and a spacer material are present, introducing a liquid        electrolyte into the carrier material, the spacer material or        the carrier material and the spacer material.        In an embodiment, the method of this aspect further comprises        the step of filling a plurality of ion-conduits in at least two        of a plurality of layers of a first type comprising an active        material, each of the ion-conduits having a longitudinal axis        and being filled with an electrolyte or a carrier material;        wherein the ion-conducting conduits are in ionic communication        with at least one layer of the second type after assembly of the        multilayered electrode. In an embodiment, the longitudinal axes        of at least two of the ion-conducting conduits in adjacent        layers of the first type are aligned.

In additional embodiments, the disclosure provides a method forassembling a multilayered electrode, the method comprising the steps of:

-   -   a. Filling a plurality of ion-conduits in at least two of a        plurality of layers of a first type comprising an active        material, the ion-conduits being filled with an electrolyte or a        carrier material;    -   b. Stacking        -   i. The plurality of layers of a first type comprising an            active material; and        -   ii. At least one layer of a second type comprising a spacer            material or a solid or gel electrolyte,        -   iii. at least one layer of a third type comprising a current            collector, wherein the current collector is perforated, a            mesh or porous        -   wherein each layer of a first type is separated from each            adjacent layer of a first type by at least one layer of a            second type or at least one layer of a third type    -   c. When a carrier material, a spacer material or a carrier        material and a spacer material are present, introducing a liquid        electrolyte into the carrier material, the spacer material or        the carrier material and the spacer material    -   wherein the ion-conducting conduits are in ionic communication        with at least one layer of the second type after assembly of the        multilayered electrode.        In an embodiment, the longitudinal axes of at least two of the        ion-conducting conduits in adjacent layers of the first type are        aligned. In an embodiment, each of the layers of the first type        includes an aperture, each of the layers of the second type        includes an aperture and each of the layers of the third type        include an aperture, the apertures are aligned to form a passage        through the layers of the first type, the second type and the        third type, an electronically conductive material is placed        within the passage and the electronically conductive material is        in electronic communication with the at least one layer of a        third type after assembly of the multilayered electrode.

In an aspect the disclosure, the disclosure provides a layered electrodefor an electrochemical cell comprising of at least 2 substantiallyparallel plates separated by a space, where the space is at leastpartially filled with a electrolyte. In an embodiment, for example, eachof the plates has at least one aperture that is substantiallyperpendicular to a plane parallel to planes of the plates, wherein theapertures extend substantially through at least 2 of the plates of thelayered electrode. In an embodiment, the electrode further comprises acurrent collector, wherein the current collector of the layeredelectrode is composed of at least one base-plate and at least one rodthat are electronically connected, where the base plate(s) of thecurrent collector is substantially parallel to the plane of theelectrode plates, and the rod of the current collector is substantiallyperpendicular to the plates. In an embodiment, at least one of the baseplates of the current collector has a geometric surface area that islarger than the geometric surface area of the electrode. In anembodiment, the current collector further comprises at least of oneauxiliary plate that is electronically connected to at least onebase-plate by at least of the rods.

In an aspect the disclosure provides, an electrochemical cell having atleast one layered electrode comprising of at least 2 substantiallyparallel plates separated by a space, where the space is at leastpartially filled with a electrolyte. In an aspect the disclosureprovides, an electrochemical cell having at least one layered electrodecomprising of at least 2 substantially parallel plates separated by aspace, where the space is at least partially filled with a electrolyte;wherein each of the plates has at least one aperture that issubstantially perpendicular to a plane parallel to planes of the plates,wherein the apertures extend substantially through at least 2 of theplates of the layered electrode. In an embodiment, at least one of theapertures is filled with a material with ionic conductivity at least 50%higher than the active material of the electrode. In an embodiment, theat least one of the apertures is filed with the same active material asthe electrode but having at least two times the porosity of the rest ofthe plate. In an embodiment, the at least one of the apertures is filedwith a solid electrolyte. In an embodiment, the at least one of theapertures is filled substantially with one or more ceramic fillers. Inan embodiment, the at least one of the apertures is filled substantiallywith Al₂O₃, SiO₂ or both having particle sizes of less than 1 um. In anembodiment, at least one of the through-extending apertures of thelayered electrode is filled with a combination of an opposite electrodematerial (for example anode, such as graphite or silicon or lithium) andan electronically insulating material separating the two oppositeelectrode materials.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A: schematically illustrates a cross-sectional view of anelectrochemical cell having a three-dimensional network for iontransport. Cell (1) includes anode (10), cathode (20) and separator (30)disposed between the anode and the cathode. Adjacent anode layerscomprising an active material (12) are separated by layers comprisingelectrolyte (16). Similarly, adjacent cathode layers comprising anactive material (22) are separated by layers comprising electrolyte(26). Electrolyte-containing conduits in the anode (14) and similarconduits in the cathode (24) are also shown.

FIG. 1B: shows a top view of the cell of FIG. 1A and shows an exemplarydistribution of electrolyte-containing conduits (14) in a layercomprising an active material (12).

FIG. 2A: schematically illustrates a side view of anotherelectrochemical cell having a three-dimensional network for iontransport. Adjacent anode layers comprising an active material (12) areseparated by layers comprising electrolyte (16). Similarly, adjacentcathode layers comprising an active material (22) are separated bylayers comprising electrolyte (26). Electrolyte-containing conduits inthe anode (14) and similar conduits in the cathode (24) are also shown.FIG. 2B is a top view of the cell of FIG. 2A illustrating slot-shapedconduits (14).

FIG. 3A: schematically illustrates side view of an electrochemical cellhaving a three-dimensional network for ion transport and also havingcurrent collectors (28) within the active material of cathode (20). Asillustrated, an ion-conducting channel (25) is formed through each pairof layers comprising an active material (22) having a current collector(28) between them. As illustrated anode (10) incorporates a currentcollector (18).

FIG. 3B: illustrates a multilayer assembly of anode active layers,cathode active layers, separators and current collectors.

FIG. 4A schematically illustrates a front cross-sectional view ofanother electrochemical cell. The cathode includes layers comprising anactive material (22), layers comprising an electrolyte (26) and layerscomprising an auxiliary current collector film (28). Ion-conductingchannel (25) is also shown. The anode includes layers comprising anactive material (12), layers comprising an electrolyte (16) and layerscomprising a current collector (18). Ion-conducting channel (15) is alsoshown

FIG. 4B schematically illustrates one configuration for making anelectronic connection to the layers comprising the auxiliary currentcollector thins films in the layered electrode to the primary electrodecurrent collector (52) connected to relevant the external tab of thecell of FIG. 4A (side view). (

FIGS. 4C and 4D each schematically illustrate a top view of the cell ofFIG. 4A and electronic connection of electrode layers of active materialto the electrode primary current collector (51) to an outside tab

FIG. 5A schematically illustrates a cross-sectional side view of anelectrochemical cell which include an additional passage comprising anelectronically conducting material through layers of each electrode. Thepassage in the anode is denoted by (17); the passage in the cathode isdenoted by (27).

FIG. 5B schematically illustrates a cross-sectional side view of anelectrochemical cell which include an additional passage comprising anelectronically conducting material, the passage passing through layersof each electrode. Anode primary current collector (51) and cathodeprimary current collector (52) are also shown.

FIG. 5C schematically illustrates a cross-sectional side view of anelectrochemical cell which include an additional passage comprisinglithium (19), the passage passing through layers of the anode. A lithiummetal tab (59) is also shown.

FIG. 6A: schematically illustrates another electrochemical cell. Boththe anode and cathode include layers comprising an active material,layers comprising an electrolyte, ion-conducting channels and passagescomprising an electronically conducting material.

FIG. 6B: schematically illustrates another electrochemical cell. Boththe anode and cathode include layers comprising an active material,layers comprising an electrolyte, ion-conducting channels and passagescomprising an electronically conducting material.

FIG. 7A: schematically illustrates another electrochemical cell. Thecathode (20) includes electrode material (72), a plurality of currentcollector layers (28) and a plurality of current collector rods (77).The current collector layers are in electronic communication with thecurrent collector rods, which in turn are in electronic communicationwith the primary current collector layer (52).

FIG. 7B: schematic illustration of a cathode of the electrochemicalcells of FIG. 7C. The cathode (20) includes electrode material (72), aplurality of current collector layers (28) and a plurality of currentcollector rods (77). In this cathode the current collector rods do notspan the electrode material. The current collector layers are inelectronic communication with the current collector rods, which in turnare in electronic communication with the primary current collector layer(52). FIG. 7C schematic illustration of electrochemical cell.

FIG. 8A: Current collector disk (52) with pins (77). The pins are 0.5 mmtall here. On right a porous small disk (78) is shown

FIG. 8B: Current collector disk (52) with pins (77). A porous small disk(78) is shown inserted over one of the pins.

FIG. 8C: Current collector disk (52) with secondary current collectorlayer (28).

FIGS. 8D and 8E: Images of nonwoven polymeric separator material. FIG.8D: lower magnification; FIG. 8E: higher magnification.

FIGS. 9A and 9B: FIG. 9A: schematically illustration of a cathode of theelectrochemical cell of FIG. 9B (side view). The cathode (20) includeselectrode material (72), a plurality of current collector layers (28), aplurality of current collector layer segments (78) and a plurality ofcurrent collector rods (77). In this cathode the current collector rodsdo not span the electrode material. The current collector layers are inelectronic communication with the current collector rods, which in turnare in electronic communication with the primary current collector layer(52). FIG. 9B schematic illustration of electrochemical cell.

FIGS. 9C and 9D FIG. 9C: schematic illustration of a cathode of theelectrochemical cell of FIG. 9D (side view). The cathode (20) includeselectrode material (72), a plurality of current collector layers (28), aplurality of current collector layer segments (78) and a plurality ofcurrent collector rods (77). The current collector layers are inelectronic communication with the current collector rods, which in turnare in electronic communication with the primary current collector layer(52). Electronically conductive adhesive (80) is show at the junction ofsome of the current collector rods with the current collector layersegments. FIG. 9D schematic illustration of electrochemical cell.

FIG. 10: schematic illustration of a cathode including a plurality ofsecondary current collector layers (28), a plurality of currentcollector rods (77), and a plurality of ion-conducting channels (25).

FIGS. 11A, 11B and 11C: Anode material layers (12) with internal currentcollector (18). FIG. 11A: Front view. FIG. 11B: Side view. FIG. 11C: Topview.

FIG. 12A: Battery case (100) with anode spaces (110) and cathode spaces(120). A separator (30), which can be a solid electrolyte, is disposedbetween anode and cathode spaces. Top view before placing the anodes andthe cathodes.

FIG. 12B: Battery case (100) with anode spaces (110) and cathode spaces(120). Cathode tab (125) and anode tab (115) also shown.

FIG. 13: Schematic illustration of cell assembly of multilayer anodesand multilayer cathodes, which a separator between each anode and eachcathode. From left to right: anode stack, cathode stack, anode stack andcathode stack.

FIG. 14: Top view of cell assembly showing top of anode and cathodestacks with a separator between each anode and cathode.

FIG. 15: Top view of cell assembly showing extension of anode currentcollector layers (18) and cathode current collector layers (28).Separators (30) also shown, as well as section lines B-B and A-A.

FIG. 16A: Side view (A-A cross-section) of anode stack, showingextension of current collector layers (18) past the other layers on bothsides of the stack.

FIG. 16B: Side view (B-B cross-section) of cathode stack, showingextension of current collector layers (28) past the other layers on bothsides of the stack.

FIG. 17A: Side view (A-A cross-section) of anode stack, showingextension of current collector layers (18) past the other layers on onlyone side of the stack.

FIG. 17B: Side view (B-B cross-section) of cathode stack, showingextension of current collector layers (28) past the other layers on onlyone side of the stack.

FIG. 18A: Side view (A-A cross-section) of anode stack, showingextension of current collector layers (18) past the other layers on onlyone side of the stack and connection to primary anode current collector(51).

FIG. 18B: Side view (B-B cross-section) of cathode stack, showingextension of current collector layers (28) past the other layers on onlyone side of the stack and connection to primary cathode currentcollector (52).

FIG. 19A: Side view (A-A cross-section) of anode stack, showing oneconfiguration of anode tab (115) and cathode tab (125).

FIG. 19B: Side view (A-A cross-section) of anode stack, showing anotherconfiguration of anode tab (115) and cathode tab (125).

FIG. 20: Top view of cell assembly showing connection of anode currentcollector layers to primary anode current collector (51) and connectionof cathode current collector layers to primary cathode current collector(52).

FIG. 21: Front view between case and cell of anode and cathode primarycurrent collector layers.

FIG. 22: Front view between case and cell of anode and cathode currentcollector layers, showing isolative layer (150) on top and bottom ofcell.

FIG. 23: Front view between case and cell of anode and cathode currentcollector layers, showing isolative layer (150) on top and bottom ofcell, main anode current collector (51) and main cathode currentcollector (52).

FIG. 24: Battery case (100) with anode spaces (110) and cathode spaces(120). Cathode tab (125) and anode tab (115) also shown. Top view beforeplacing the anodes and the cathodes.

FIGS. 25A, 25B, 25C, and 25D: FIG. 25A: rod electrodes on a substrate(side view). FIG. 25B: Side view of an individual rod electrode, showingthat each rod may be comprised of a bundle of smaller rods. FIG. 25C:Top view of an individual rod electrode, showing that each rod may becomprised of a bundle of smaller rods. FIG. 25D: rod electrodes on asubstrate (top view). The substrate can be the current collector (mesh,grid or thin film). The substrate can be a planar electrode itself, withthe current collector and active material.

FIGS. 26A, 26B, and 26C: FIG. 26A: rod electrodes on a substrate (sideview). Rod electrodes may extend from opposite sides of the substrate.FIG. 26B: fibers on rod electrodes. Fibers can also be polymers toincrease the ionic conductivity or improve shape change accommodation(flexible fibers). Each of the rods can have fibers in it to improve themechanical performance (reinforcement with stronger materials) anddurability, for ease of fabrication, or for improving the electronicconductivity (made of metals such as Al, Cu, steel, Ti) or carbonmaterials (such as carbon fibers, carbon nanotubes). The fiber can bethe current collector too. The fibers can have diameters of about 1% to20% of the diameter of the rod. The length can be 0.01× to 100× of therod length. Fibers longer than the rod length means that the fibers arebent to fit inside. FIG. 26C: rod electrodes on a substrate (top view).

FIGS. 27A, 27B, and 27C: FIG. 27A: rod electrodes on a substrate withauxiliary current collectors (side view). Depicting current collectorsfor the rod electrodes. More than one auxiliary current collector rodcan be used for each of the rods. The auxiliary current collector platein the substrate may extend beyond the substrate, to be connect to aprimary current collector tab for the rod electrodes. FIG. 27B: sideviews of individual rod electrodes, auxiliary current collector rods,and auxiliary current collector rods inside rod electrodes. FIG. 27C:rod electrodes on a substrate with auxiliary current collector rods,auxiliary current collector plate, and primary current collector tab(top view).

FIGS. 28A, 28B, and 28C: FIG. 28A: rod electrodes on a substrate, withauxiliary current collectors, and a secondary separator coating on therod electrodes (side view). FIG. 28B: side view of an individualauxiliary current collector rod, rod electrode, and a rod electrodecoated with a secondary separator. FIG. 28C: rod electrodes on asubstrate, with auxiliary current collectors, a secondary separatorcoating on the rod electrodes, auxiliary current collector plate, andprimary current collector tab for the rod electrodes (top view).

FIGS. 29A, 29B, and 29C: Schematic illustrating primary separator layersof embodiments of the invention. FIG. 29A: rod electrodes on asubstrate, with auxiliary current collectors, secondary separatorcoating, and perforated primary separator layer (side view). A side viewof an individual perforated primary separator layer is also shown. FIG.29B: top view of a perforated primary separator film. FIG. 29C: rodelectrodes on a substrate, with auxiliary current collector rods andplate, secondary separator coating, perforated primary separator layer,and primary current collector tab (top view).

FIGS. 30A, 30B, and 30C: Schematic illustrating plate electrodes ofembodiments of the invention. FIG. 30A: rod electrodes on a substrate,with auxiliary current collectors, secondary separator coating,perforated primary separator layer, and perforated plate electrodes(side view). A side view of an individual perforated plate electrode isalso shown. FIG. 30B: top view of a perforated plate electrode. FIG.30C: rod electrodes on a substrate, with auxiliary current collectorrods and plate, secondary separator coating, perforated primaryseparator layer, perforated plate electrodes, and primary currentcollector tab (top view).

FIGS. 31A, 31B, and 31C: Schematic illustrating current collector forplate electrodes of embodiments of the invention. FIG. 31A: rodelectrodes on a substrate, with auxiliary current collectors, secondaryseparator coating, perforated primary separator layer, perforated plateelectrodes, and plate electrode current collectors (side view). A sideview of an individual plate electrode current collector is also shown.FIG. 31B: top view of a plate electrode current collector. FIG. 31C: rodelectrodes on a substrate, with auxiliary current collector rods andplate, secondary separator coating, perforated primary separator layer,perforated plate electrodes, plate electrode current collector, andprimary current collector tab (top view).

FIGS. 32A and 32B: Schematic illustrating perforated cathode plated.FIG. 32A shows side view. FIG. 32B shows top view.

FIGS. 33A, 33B, 33C, and 33D: Schematic illustrating: Guide holes incathode plates for alignment, and Guide rods in external and currentcollector for alignment. FIG. 33A: side view of multiple perforatedcathode plate electrodes. FIG. 33B: shows a top view of FIG. 33A. FIG.33C: side view of multiple perforated cathode plate electrodes on top ofa current collector plate. FIG. 33D: top view of a current collectorplate.

FIG. 34: Schematic illustrating anode rods and substrate. Anode rods canbe silicon grown (CVD, PVD, etc.) or etched (wet or dry) on a substrate.Or can be silicon coating on another rod-based (such as on Nanocarbonpillars).

FIGS. 35A and 35B: FIG. 35A: side view schematic illustrating anode rodelectrodes on a substrate with an electronically insulative secondaryseparator coating (e.g. porous PVDF, PE or PP or solid electrolyte:e.g., LIPON, LISICON, PEO) can be applied to the anode (coating, dipcoating in dissolved materials, spray coating of dissolved polymer insolvents (e.g. NMP), CVD, PVD, electrophoretic, etc.). FIG. 35B: sideview of an individual rod electrode with a secondary separator coating.

FIG. 36: Schematic showing Different methods of fabricating the rodelectrodes. Silicon Nano (powder, rod, tube).

FIGS. 37A and 37B: FIG. 37A: show a rod electrode array on a substrate,with secondary separator coating, and with perforated cathode plateelectrodes stacked on top of the rod electrode array (side view). FIG.37B: two assemblies of FIG. 37A stacked on each other with the rodelectrodes facing each other (second assembly rotated 180° from theother).

FIG. 38: Schematic illustrating the addition of auxiliary currentcollectors to collect current from the corresponding electrode, anode orcathode

FIG. 39: Schematic illustrating an auxiliary lithium metal film as theauxiliary current collector:

FIG. 40: Schematic illustrating: anode rod electrode arrays on oppositessides of a substrate. Anode rods can be silicon grown (CVD, PVD, etc.)or etched (wet or dry) on a substrate. Or can be silicon coating onanother rod0based (such as on Nanocarbon pillars).

FIG. 41: Schematic illustrating electrochemical system having a threedimensional geometry.

FIG. 42: Schematic illustrating electrochemical system a threedimensional geometry.

FIGS. 43A and 43B: Schematic illustrating: Positive cathode currentcollector (e.g. Al), negative anode current collector (e.g. Cu),insulators, perforated cathode plate electrodes (e.g. LCO, LFP, Sulfur),anode rod electrodes (rods, base) (e.g. silicon), electrolyte (solid orliquid between the anode and cathode) (side view).

FIG. 43B: top view of electrochemical cell in FIG. 43A, showing examplepossible shapes of the cell.

FIGS. 44A and 44B: Schematics illustrating electrochemical system havingparallel geometries.

FIGS. 45A and 45B: Schematic illustrating: Shared positive cathodecurrent collector and shared negative anode current collectors. FIG. 45Ashows a side view of the cell. FIG. 45B shows a cross section.

FIGS. 46A and 46B: Schematics illustrating electrochemical system havinga parallel arrangement. FIG. 46A: electrochemical system with individualexternal positive cathode current collector. FIG. 46A: electrochemicalsystem with shared external positive cathode current collector.

FIG. 47: Schematic illustrating individual external positive currentcollector-battery cases with parallel arrangement

FIGS. 48A and 48B: Schematic illustrating electrochemical system: FIG.48A shows a side view of the cell. FIG. 48B shows a cross section.

FIGS. 49A and 49B: FIG. 49A: Schematic illustrating electrochemicalsystem with a series arrangement. FIG. 49B shows a cross section.

FIGS. 50A and 50B: FIG. 50A: Schematic illustrating electrochemicalsystem with a shared positive current collector and shared negativecurrent collectors (side view of the cell). FIG. 50B shows a crosssection.

FIG. 51: Schematic illustrating electrochemical system with differentarrangement of the cells to make battery packs.

FIG. 52: Schematic illustrating:Dimensions: 20 cm×5 cm×1 mm total, 10plates; Semi-solid NMC; Gel-polymer electrolyte; Si—Li anode wires.:Silicon nano wires coated on carbon nano or micro wires on a correctcollector.: perforated aluminum films as cathode current collectors.:lithium wires. A larger cell can be made by stacking layers of siliconnanowires (with solid electrolyte shell) on substrate layers (can havenanowires on both sides) on top of each other, Continuous lithium wirescan be places by punching the silicon layers. Finally layers ofperforated aluminum films are placed between the anode layers and fillthe empty spaces with the suspension of the cathode active material andconductive carbon in the non-aqueous electrolyte.

FIGS. 53A, 53B, 53C, and 53D: components of an example coincell-typeelectrochemical system with a multi layered electrode using a 500 μmthick electrode array and an auxiliary current collector/aligner system.FIG. 53A: shows the aluminum 3-dimentional auxiliary current collectorplaced inside a 2032-type coin cell cup, which also serves as alignerfor the perforated plates. FIG. 53B: shows one of the layers of themultilayer electrode, consisting of perforated active material, which iscoated on an auxiliary current collector plate. FIG. 53C: shows a thinporous spacer that will hold the liquid electrolyte to providesufficient ionic connectivity between the layers. FIG. 53D: shows theaddition of a Celgard separator layer, which completes the half-cellconstruction by placing the addition of the Li electrode on the otherside of it.

FIG. 54: Experimental results for Coincell 2032 testing of half-cellswith commercial electrolyte and layered cathode. Specific Maximumspacing between the conduits was about 1 mm. Thick electrodedemonstrated more than 90% of the capacity of the reference commercialone layer LiCoO2 half-cell at C/6 rate.

FIG. 55: Experimental results for CR2032 half-cell testing at C/6 rate.Two layered cathode cell with 500 μm holes and 1000 μm center to centerspacing compared to a reference LiCoO₂ cell using the same electrodefoil. The reference cell was made with commercial electrode film.

DETAILED DESCRIPTION OF THE INVENTION

In general the terms and phrases used herein have their art-recognizedmeaning, which can be found by reference to standard texts, journalreferences and contexts known to those skilled in the art. The followingdefinitions are provided to clarify their specific use in the context ofthe invention.

Referring to the drawings, like numerals indicate like elements and thesame number appearing in more than one drawing refers to the sameelement. In addition, hereinafter, the following definitions apply:

The term “electrochemical cell” refers to devices and/or devicecomponents that convert chemical energy into electrical energy orelectrical energy into chemical energy. Electrochemical cells have twoor more electrodes (e.g., positive and negative electrodes) and anelectrolyte, wherein electrode reactions occurring at the electrodesurfaces result in charge transfer processes. Electrochemical cellsinclude, but are not limited to, primary batteries, secondary batteriesand electrolysis systems. In certain embodiments, the termelectrochemical cell includes fuel cells, supercapacitors, capacitors,flow batteries, metal-air batteries and semi-solid batteries. Generalcell and/or battery construction is known in the art, see e.g., U.S.Pat. Nos. 6,489,055, 4,052,539, 6,306,540, Seel and Dahn J. Electrochem.Soc. 147(3) 892-898 (2000).

The expression “active material” refers to a material that iselectrochemically active, for example, a material that participates inthe electrochemical half reactions of an electrochemical system, such asa primary or secondary electrochemical cell. The expression “activematerial layer” and “layer comprising an active material” are usedinterchangeably and refers to a layer that comprises anelectrochemically active material. An active material layer may includeother components in addition to the electrochemically active material,such as binders, conductive materials, electrochemical additives,structural additives and any combination thereof. The active materiallayer in some embodiments is porous, such as having a porosity selectedform the range of 10% to 50%, optionally 20% to 40%. In an embodiment,for example, an active material layer comprises 90% LiCo2, 5% carbonblack and 5% pvdf binder and has a porosity of 30%.

The term “capacity” is a characteristic of an electrochemical cell thatrefers to the total amount of electrical charge an electrochemical cell,such as a battery, is able to hold. Capacity is typically expressed inunits of ampere-hours. The term “specific capacity” refers to thecapacity output of an electrochemical cell, such as a battery, per unitweight. Specific capacity is typically expressed in units ofampere-hours kg⁻¹.

The term “discharge rate” refers to the current at which anelectrochemical cell is discharged. Discharge current can be expressedin units of ampere-hours. Alternatively, discharge current can benormalized to the rated capacity of the electrochemical cell, andexpressed as C/(X t), wherein C is the capacity of the electrochemicalcell, X is a variable and t is a specified unit of time, as used herein,equal to 1 hour.

“Current density” refers to the current flowing per unit electrode area.

Electrode refers to an electrical conductor where ions and electrons areexchanged with electrolyte and an outer circuit. “Positive electrode”and “cathode” are used synonymously in the present description and referto the electrode having the higher electrode potential in anelectrochemical cell (i.e. higher than the negative electrode).“Negative electrode” and “anode” are used synonymously in the presentdescription and refer to the electrode having the lower electrodepotential in an electrochemical cell (i.e. lower than the positiveelectrode). Cathodic reduction refers to a gain of electron(s) of achemical species, and anodic oxidation refers to the loss of electron(s)of a chemical species. Positive electrodes and negative electrodes ofthe present electrochemical cell may further comprises a conductivediluent, such as acetylene black, carbon black, powdered graphite, coke,carbon fiber, graphene, and metallic powder, and/or may furthercomprises a binder, such polymer binder. Useful binders for positiveelectrodes in some embodiments comprise a fluoropolymer such aspolyvinylidene fluoride (PVDF). Positive and negative electrodes of thepresent invention may be provided in a range of useful configurationsand form factors as known in the art of electrochemistry and batteryscience, including thin electrode designs, such as thin film electrodeconfigurations. Electrodes are manufactured as disclosed herein and asknown in the art, including as disclosed in, for example, U.S. Pat. Nos.4,052,539, 6,306,540, 6,852,446. For some embodiments, the electrode istypically fabricated by depositing a slurry of the electrode material,an electrically conductive inert material, the binder, and a liquidcarrier on the electrode current collector, and then evaporating thecarrier to leave a coherent mass in electrical contact with the currentcollector.

“Electrode potential” refers to a voltage, usually measured against areference electrode, due to the presence within or in contact with theelectrode of chemical species at different oxidation (valence) states.

“EIectroIyte” refers to an ionic conductor which can be in the solidstate, the liquid state (most common), or more rarely a gas (e.g.,plasma). Gels are another form of electrolyte known to the art.

“Standard electrode potential”) (E°) refers to the electrode potentialwhen concentrations of solutes are 1M, the gas pressures are 1 atm andthe temperature is 25 degrees Celsius. As used herein standard electrodepotentials are measured relative to a standard hydrogen electrode.

“Active material” refers to the material in an electrode that takes partin electrochemical reactions which store and/or delivery energy in anelectrochemical cell.

“Cation” refers to a positively charged ion, and “anion” refers to anegatively charged ion.

As used herein, substantially parallel refers to the spatial alignmentor configuration of two or more elements or structures, such as devicesor components of an electrochemical system. In some embodiments, forexample, two elements are substantially parallel when a normal to thesurface of the first element is parallel to a normal to the surface ofthe second element to within 5 degrees, or optionally 10 degrees, oroptionally 15 degrees, or optionally 20 degrees or optionally 25degrees.

As used herein, substantially perpendicular refers to the spatialalignment or configuration of two or more elements or structures, suchas devices or components of an electrochemical system. In someembodiments, for example, two elements are substantially perpendicularwhen a normal to the surface of the first element is perpendicular to anormal to the surface of the second element to within 5 degrees, oroptionally 10 degrees, or optionally 15 degrees, or optionally 20degrees or optionally 25 degrees.

“Electrical contact” and “electrical communication” refers to thearrangement of one or more objects such that an electric currentefficiently flows from one object to another. For example, in someembodiments, two objects having an electrical resistance between themless than 100Ω are considered in electrical communication with oneanother. An electrical contact can also refer to a component of a deviceor object used for establishing electrical communication with externaldevices or circuits, for example an electrical interconnection.“Electrical communication” also refers to the ability of two or morematerials and/or structures that are capable of transferring chargebetween them, such as in the form of the transfer of electrons. In someembodiments, components in electrical communication are in directelectrical communication wherein an electronic signal or charge carrieris directly transferred from one component to another. In someembodiments, components in electrical communication are in indirectelectrical communication wherein an electronic signal or charge carrieris indirectly transferred from one component to another via one or moreintermediate structures, such as circuit elements, separating thecomponents. Similarly “ionic contact” and “ionic communication” refersto the arrangement of one or more objects such that an ions efficientlyflow from one object to another.

“Thermal contact” and “thermal communication” are used synonymously andrefer to an orientation or position of elements or materials, such as acurrent collector or heat transfer rod and a heat sink or a heat source,such that there is more efficient transfer of heat between the twoelements than if they were thermally isolated or thermally insulated.Elements or materials may be considered in thermal communication orcontact if heat is transported between them more quickly than if theywere thermally isolated or thermally insulated. Two elements in thermalcommunication or contact may reach thermal equilibrium or thermal steadystate and in some embodiments may be considered to be constantly atthermal equilibrium or thermal steady state with one another. In someembodiments, elements in thermal communication with one another areseparated from each other by a thermally conductive material orintermediate thermally conductive material or device component. In someembodiments, elements in thermal communication with one another areseparated by a distance of 1 μm or less. In some embodiments, elementsin thermal communication with one another are provided in physicalcontact.

“Porosity” refers to the amount of a material or component, such as ahigh mechanical strength layer, that corresponds to pores, such asapertures, channels, voids, etc. Porosity may be expressed as thepercentage of the volume of a material, structure or device component,such as a high mechanical strength layer, that corresponds to pores,such as apertures, channels, voids, etc., relative to the total volumeoccupied by the material, structure or device component.

In embodiments, elements of the electrode are aligned, for examplehaving a preselected positions relative with each other. In someembodiments, two or more aligned elements extend along the same oroverlapping alignment axes. In some embodiments, two or more alignedelements are positioned substantially parallel to each other. In someembodiments, two or more aligned elements (such as ion-conductingconduits or apertures in adjacent layers) are provide in a spatialarrangement such that electrolyte can transport between them. In someembodiments, two or more aligned elements (such as ion-conductingconduits or apertures in adjacent layers) are provide in a spatialarrangement such that ions can be transported from one element to theother. In some embodiments, two or more aligned elements (such asion-conducting conduits or apertures in adjacent layers) are provide ina spatial arrangement such that together they form a continuous passage,channel or cavity. In some embodiments, two elements are aligned whenthe longitudinal axis of the first element is aligned with thelongitudinal axis of the second element within 5 degrees, optionally 10degrees, optionally 15 degrees, optionally 20 degrees or optionally 25degrees. In further elements, multiple elements may be aligned along analignment axis when the longitudinal axes of each element aligns withthe alignment axis within optionally 5 degrees, optionally 10 degrees,optionally 15 degrees, optionally 20 degrees or optionally 25 degrees.

In additional embodiment, elements of the electrode or theelectrochemical cell are substantially parallel or substantiallyperpendicular. In embodiments, two elements are substantially parallelwhen a normal to the surface of the first element is parallel to anormal to the surface of the second element to within 5 degrees,optionally 10 degrees, optionally 15 degrees, optionally 20 degrees oroptionally 25 degrees. Similarly, in embodiments two elements aresubstantially perpendicular when a normal to the surface of the firstelement is perpendicular to a normal to the surface of the secondelement to within 5 degrees, optionally 10 degrees, optionally 15degrees, optionally 20 degrees or optionally 25 degrees.

A variety of cathode active materials are known to the art. Lithium ioncathode materials known to the art include, but are not limited to,lithium metal oxides, lithium metal phosphates, and sulfur basedcathodes. Lithium metal oxides include lithium cobalt oxide (LiCoO₂),lithium manganese oxide (LiMn₂O₄), lithium nickel manganese cobalt oxide(LiNiMnCoO₂ or NMC), lithium nickel cobalt aluminum oxide (LiNiCoAlO₂ orNCA). Lithium metal phosphates include lithium cobalt phosphate andlithium iron phosphate (LiFePO₄). Lithium metal sulfur compounds includelithium iorn flurosulfate and lithium titanium sulfide. Air basedcathodes are also known to the art.

A variety of anode active materials are known to the art. Lithium ionbattery anode materials known to the art include, but are not limited tocarbon, tin, germanium, silicon, aluminum and lithium titanate. Otheranode materials include, lithium and lithium alloys.

In embodiments, the electrolyte includes any of a variety ofelectrolytes, for example useful in primary and secondaryelectrochemical cells. Useful electrolytes include, but are not limitedto: an aqueous solution; an organic solvent; a lithium salt; sulfuricacid; potassium hydroxide; an ionic liquid; a solid electrolyte; apolymer; poly(ethylene oxide); poly(propylene oxide); poly(styrene);poly(imide); poly(amine); poly(acrylonitrile); poly(vinylidenefluoride); methoxyethoxyethyoxy phosphazine; diiodomethane;1,3-diiodopropane; N,N-dimethylformamide; imethypropylene urea; ethylenecarbonate; diethylene carbonate; dimethyl carbonate; propylenecarbonate; a block copolymer lithium electrolyte doped with a lithiumsalt; glass; glass doped with at least one of LiI, LiF, LiCI,Li₂O—B₂O₃—Bi₂O₃, Li₂O—B₂O₃—P₂O₅ and Li₂OB₂O₃; a sol of at least oneoxide of Si, B, P, Ti, Zr, Bb and Bi; a sol of at least one hydroxide ofSi, B, Ti, Zr, Pb and Bi; a gel of at least one oxide of Si, B, P, Ti,Zr, Bb and Bi; a gel of at least one hydroxide of Si, B, B, Ti, Zr, Pband Bi; or any combination of these. Useful polymers further includepolyacryonitrile, poly(vinyl chloride), poly(vinyl sulfone),poly(ethylene glycol diacrylate), poly(vinyidene fluoride),poly(tetrahydrofuran), poly(dioxolane), poly(ethylane oxide),poly(propylene oxide), poly(vinyl pyrrolidinoe) and mixtures thereof.Useful electrolytes further include those comprising LiClO₄, LiBF₄,LiAsF₆, LiCF₃, SO₃, LiPF₆, and LiN(SO₂ CF₃) 2. Optionally, anelectrolyte comprises a salt selected from the group of salts consistingof Mg(ClO₄)₂, Zn(ClO₄)₂, LiAICl₄, and Ca(ClO₄)₂. Optionally, anelectrolyte is a solid, for example comprising a material selected fromthe group consisting of phosphorous based glass, oxide based glass,oxide sulfide based glass, selenide glass, gallium based glass,germanium based glass, sodium and lithium betaalumina, glass ceramicalkali metal ion conductors, and Nasiglass. a polycrystalline ceramicselected from the group consisting of LISICON, NASICON, Li_(0.3)La_(0.7)TiO₃ sodium and lithium beta alumina, LISICON polycrystalline ceramicsuch as lithium metal phosphates. LISICON refers to Lithium Super IonicConducture, a family of solids with the chemical formulaLi_(2+2x)Zn_(1-x)GeO₄. NASICON refers to Na (sodium) Super IonicConductor and includes solids with the formulaNa_(1+x)Zr₂Si_(x)P_(3-x)O₁₂. 0<x<3.

In general, the terms and phrases used herein have their art-recognizedmeaning, which can be found by reference to standard texts, journalreferences and contexts known to those skilled in the art.

Without wishing to be bound by any particular theory, there may bediscussion herein of beliefs or understandings of underlying principlesrelating to the devices and methods disclosed herein. It is recognizedthat regardless of the ultimate correctness of any mechanisticexplanation or hypothesis, an embodiment of the invention cannonetheless be operative and useful.

The invention is further detailed in the following examples, which areoffered by way of illustration and are not intended to limit the scopeof the invention in any manner

Example 1: Multi-Layer Electrodes

The invention provides novel cell architecture for batteries (e.g.,alkaline, li-ion, zinc based) and flow batteries. Aspects of theinvention result in higher performance of electrochemical cells,particularly batteries. Aspects of the invention significantly increaseWh/kg and Wh/L or rate performance. Aspects of the invention also enablehigh capacity novel electrode materials.

The layered electrode of certain embodiments also allows better shapechange accommodation (for shape changing materials such as silicon inli-ion batteries; or zinc in zinc batteries) and for better electronicconductivity (for low electronic conductivity materials such as sulfurin Li-ion batteries). The cell architecture of certain embodiments alsoenables high rate and higher performance air cathode for metal airbatteries, such as Li-air, Al-air and Zinc-air (air flowing from thehole channels to the carbon cathode layers). The systems of theinvention may use multiple chemistries for each of the anode or cathodelayers.

Aspects of certain embodiments, for example, enable lithium metal insidethe Li-ion cell, enabling non-lithiated cathode and anode materials suchas silicon anode-sulfur cathode. Aspects of certain embodiments, forexample, enable a long life cycle by providing Li-ions excess. Aspectsof certain embodiments also enable better cell management by using thelithium rod (wire) as a reference electrode.

Certain electrochemical systems of the invention are characterized aschemistry agnostic, whereby any battery chemistry may be used such asLi-ion, alkaline, or lead-acid as well as flow batteries, metal airbatteries and semi-solid chemistries.

In an embodiment, for example, an electrochemical cell systems provideshigher Wh/kg and Wh/L values, via a thinner and lighter system, whereinthe system comprises: a layered cathode and a layered anode, with 8layers of active anode material and 8 layers of active cathode material,each single layer of the active material is 75 μm thick. The totalthickness of current collector layers totals only 40 μm, and totalthickness of separators layers is 50 μm layer(s), with the systemthereby totaling 1290 μm in thickness. In contrast, a electrochemicalcell system with same thickness of active material layers results incurrent collector thickness totaling 80 μm (8×10 μm) and separatorthickness totaling 80 μm (4×20 μm), with the system thereby totaling1360 μm in thickness.

In electrochemical systems of certain embodiments, for example, eachelectrode layers can be pressed or attached to each other for ease ofmanufacturing, which also results in thinner current collector layerrequirements for each of the layers as the winding tension isdistributed to several layers instead of one.

In electrochemical systems of certain embodiments, for example, each ofthe cathode or each of anode layers, or all, can be perforated to createfast vertical ion movement. Some holes can also be used to implementcurrent collectors in the form of rods (77) in them. Or to allow thepassage of air (oxygen, gas or liquid fuel) or flowing slurries orelectrolyte.

In electrochemical systems of certain embodiments, for example, holes inanode and cathode can be random or periodic (if periodic: can be alignedor not).

FIGS. 1A, 1B, 2A, 4A, and 5A-5C illustrate aspects of exampleelectrochemical systems a three dimensional network for ion transport.The illustrated example cell includes 4 anode active layers (12), whichmay be perforated, separated from each other by electrolyte-containinglayers (16, together with anode layers 10), which may be comprised of anonwoven polymer including polypropylene, polyethylene, andpolyvinylidene fluoride or a metal material, and which also behave asspacer layers. The anode active layers may be 10-150 μm thick and theelectrolyte-containing layers may be 0.5 to 10 μm thick. A separatorlayer, which may be 20 μm thick, separates the cathode and anode layers.4 Cathode active layers (22) lie on the other side of the separator fromthe anode active layers, and may be perforated and may also be 10 to 150μm thick, with electrolyte-containing layers (26, together with cathodelayers 20) in between each cathode active layer. Theelectrolyte-containing layer (26) may also be comprised of a nonwovenpolymer including polypropylene, polyethylene, and polyvinylidenefluoride or a metal material, and also behave as spacer layers As FIG.1A also illustrates, holes, or conduits, in the cathode (14) layers andsimilarly holes, or conduits, in the anode (24) layers may also beimplemented, oriented at a transverse angle from the plane of the activelayers, to allow passage of fluid (air, oxygen, fuel, slurry,electrolyte) or solid material, such as current collection rods (77).For example, 1% to 50% of the conduits may be filled with suchelectrically conducting materials for current collection. The metalmaterial filling the conduits in the latter example may rods may includealuminum, copper, nickel, stainless steel, titanium, and carbon, forexample. The conduits may be 0.5 to 500 μm in diameter and may be 5 μmto 5 mm apart from each other, for example. As illustrated in FIGS. 1Band 2B, the latter holes (14 and 24), may be arranged periodically orrandomly. As shown in FIG. 5A, the anode layers may include auxiliaryanode current collector layers (18), oriented parallel to the anodelayers, and may be 1 to 15 μm thick. The cathode layers may also includecathode auxiliary current collector layers (28), and may also be 1 to 15μm thick. The anode and the cathode current collector layers may beperforated, porous, or may be a mesh.

As illustrated in FIG. 5A, for example, one, or more, of the anodeholes, or conduits, and one, or more, of the cathode holes, or conduits,may be filled with electrically conducting material to be implemented asthe primary current collector channels (17, 27) which connect to theanode and cathode main current collectors (FIGS. 5B, 51 and 52; alsoFIGS. 4C-4D, 51) thereby allowing connection to an external electroniccircuit. In an embodiment, for example, some of the holes, or conduits,(for example, 1% to 50%) can be filled with lithium metal (on the anodeor cathode side, or both sides) (19) and connected to a lithium externaltab (59), allowing of in situ lithiation, pre-lithiation, or lithiumdepot, or allowing use of the lithium tab as a reference electrode.

Example 2: Thick Electrodes

As used in the description herein, reference to “a film” may refer to astructure consist of several layers, and in some embodiments thisapproach is used to make the thick electrode. As used in the descriptionherein, reference to “Electronically” refers to transport of onlyelectrons. As used in the description herein, reference to “Ionically”refers to transport of only ions movement. As used in the descriptionherein, reference to “Electrically” refers to transport of either, orboth, electronically and ionically.

The disclosure provided herein is exemplified by the followingembodiments:

Embodiment 1

An electrode film with a designed 3-dimensional ionic channel networkinside the electrode to provide low resistance diffusion path for theions inside the said electrode or a method to make thick electrode filmssuch that a network of 3-dimensional ionic channels inside the electrodeprovide low resistance diffusion path for the ions inside the saidelectrode or an electrochemical cell consisting of at least oneelectrode film with a designed 3-dimensional ionic channel networkinside the electrode to provide low resistance diffusion path for ionsinside the electrode.

Embodiment 2

Embodiment 1, where the electrode is a cathode of a lithium-ion basedbattery;

Embodiment 3

Embodiment 1, where the electrode is an anode of a lithium-ion basedbattery

Embodiment 4

Embodiment 1, where the thickness of the film is more than 20 μm;

Embodiment 5

Embodiment 1 where the electrode is composed of at least one currentcollector film with a coating of electrochemical reactive material(electrode material) on it;

Embodiment 6

Embodiment 5 where the thickness of the said current collector film isless than the thickness of the said electrode material;

Embodiment 7

Embodiment 5 where the weight of the said current collector film is lessthan the weight of the said electrode material.

Embodiment 8

Embodiment 1 where the 3-dimensional ionic channel consists of at leasta group of channels substantially vertical to the surface of the saidelectrode film.

Embodiment 9

Embodiment 1 where the 3-dimensional ionic channel consists of at leasta group of channels substantially parallel to the surface of the saidelectrode film.

Embodiment 10

Embodiment 1 where the 3-dimensional ionic channel consists of at leasta group of channels substantially vertical to the surface of the saidelectrode film and a group of channel substantially parallel to thesurface of the electrode film.

Embodiment 11

Embodiment 1 where the thick electrode film is made in several steps ofplacing layers of electrode material so that a channel is formed betweeneach coated layers.

Embodiment 12

Embodiment 11 where the placing of the layers is done by coating each ofthe films on top of the previously placed layer.

Embodiment 13

Embodiment 12, where each layer is coated after the previous layer isdried completely.

Embodiment 14

Embodiment 11, where after the placing of the first layer on the saidcurrent collector of claim 1, a highly ionic conductive layer is placedon the coated layer, before placing the next layer on the previouslayer.

Embodiment 15

Embodiment 14 where the highly ionic conductive layer is selected fromthe group of at least a ceramic electrolyte, polymer electrolyte or acombination thereof.

Embodiment 16

Embodiment 14 where the highly ionic conductive layer is a porous layerwith electrolyte in it

Embodiment 17

Embodiment 14 where the highly ionic conductive layer is a nonwovenlayer.

Embodiment 18

Embodiment 14 where the highly ionic conductive layer is a wovenmaterial.

Embodiment 19

Embodiment 14 where the highly ionic conductive layer is a microporouslayer.

Embodiment 20

Embodiment 14 where the highly ionic conductive layer is a perforatedlayer.

Embodiment 21

Embodiment 14 where the highly ionic conductive is made of a ceramic.

Embodiment 22

Embodiment 14 where the highly ionic conductive is made of a metal, analloy or carbon, such as aluminum, copper, titanium, stainless steel,nickel, carbon (for example graphite, graphene, nanotubes, etc.).

Embodiment 23

Embodiment 14 where the highly ionic conductive layer is made of apolymer (such as polyethylene, polypropylene, PET, PVDF, PTFE, PEO,etc.). PET refers to polyethylene terephthalate. PVDF refers topolyvinylidene difluoride. PTFE refers to polytetrafluroethylene. PEOrefers to polyethylene oxide.

Embodiment 24

Embodiment 14 where the porosity of the highly ionic conductive layer ismore than 30%.

Embodiment 25

Embodiment 14 were the thickness of the highly ionic conductive layer isless than 0.25 mm.

Embodiment 26

Embodiment 14 where the thickness of the highly ionic conductive layeris less than 0.02 mm.

Embodiment 27

Embodiment 14 where the highly ionic conductive layer is a coatingitself on the said placed electrode layer.

Embodiment 28

Embodiment 8 where the vertical channels have at least one lateraldimension smaller than 500 μm.

Embodiment 29

Embodiment 8 where the vertical channels have at least one lateraldimension smaller than 100 μm.

Embodiment 30

Embodiment 8 where the vertical channels have at least one lateraldimension smaller than 25 μm.

Embodiment 31

Embodiment 8 where the vertical channels have at least one lateraldimension smaller than 5 μm.

Embodiment 32

Embodiment 8 where the distance between the vertical channels is atleast larger than the smallest lateral dimension of the channel.

Embodiment 33

Embodiment 8 where the distance between the vertical channels is largerthan 0.5 mm.

Embodiment 34

Embodiment 8 where the vertical channels are filled with a high ionicconductivity material.

Embodiment 35

Embodiment 34 where the highly ionic conductive layer is selected fromthe group of at least a ceramic electrolyte, polymer electrolyte or acombination thereof.

Embodiment 36

Embodiment 34 where the highly ionic conductive layer is a porous layerwith electrolyte in it.

Embodiment 37

Embodiment 34 where the highly ionic conductive layer is a nonwovenlayer.

Embodiment 38

Embodiment 34 where the highly ionic conductive layer is a wovenmaterial.

Embodiment 39

Embodiment 34 where the highly ionic conductive layer is a microporouslayer.

Embodiment 40

Embodiment 34 where the highly ionic conductive layer is a perforatedlayer.

Embodiment 41

Embodiment 34 where the highly ionic conductive is made of a ceramic.

Embodiment 42

Embodiment 34 where the highly ionic conductive is made of aluminum,copper, titanium, stainless steel, carbon (for example graphite,graphene, nanotubes, etc.).

Embodiment 43

Embodiment 34 where the highly ionic conductive is made of a polymer(such as polyethylene, polypropylene, PET, PVDF, PTFE,PEO, etc.).

Embodiment 44

Embodiment 8 where the channel is an aperture and can filled with anelectrolyte (solid, gel or liquid).

Embodiment 45

Embodiment 1 where the electrode consists of at least one electronicallyconductive layer (such as its current collector material or carbon)parallel to the plate of the electrode film

Embodiment 46

Embodiment 45 where the thickness of the said electronic conductivelayer is not more than the thickness of the said current collector isEmbodiment 1.

Embodiment 47

Embodiment 45 where the said electronic conductive layer iselectronically connected to the main current collector of the saidelectrode, mentioned in Embodiment 1.

Embodiment 48

Embodiment 45 where the said electronic conductive layer is a mesh, afoam or is a perforated layer.

Embodiment 49

Embodiment 1 where the said electrode film also consists of a group ofelectronically conductive rods (77) substantially perpendicular to theplate of the said electrode and connected to the said current collectorfilm of Embodiment 1.

Embodiment 50

Embodiment 49 where the said rods go through thickness of the saidelectrode and their length is comparable to the thickness of the saidthick electrode film of Embodiment 1.

Embodiment 51

Embodiment 50 where the said electrodes have perforations to allow thesaid current collector rods inside them.

Embodiment 52

Embodiment 1 where the cell includes both current collector films ofclaim 45 and the rods of claim 49 such that the parallel film and theperpendicular rods are electronically attached and there is negligibleelectronic resistance between them.

Embodiment 53

Embodiment 49 where the total surface of the current collector rods issmaller than 25% of the total surface of the thick electrode film.

Embodiment 54

Embodiment 49 where the diameter of the rods is smaller than 1 mm.

Embodiment 55

A method of making the electrode as in Embodiment 1 where the electrodeconsists of at least two parallel layers of the active material.

Embodiment 56

Embodiment 55 where each of the layers can have a different activematerial.

Embodiment 57

Embodiment 55 where at least one layer is sulfur based.

Embodiment 58

Embodiment 55 where at least one layer is carbon based.

Embodiment 59

Embodiment 55 where at least one layer is lithium metal oxide based.

Embodiment 60

Embodiment 55 where at least one layer is sulfur based and at least onelayer is carbon based.

Embodiment 61

Embodiment 55 where at least one layer is sulfur based and at least onelayer is lithium metal oxide based.

Embodiment 62

Embodiment 55 where each of the layers is a commercially availableelectrode film.

Embodiment 63

Embodiment 1 where the thick layer fabrication consists of at least oneof the following steps (not necessary in order)

-   -   a) placing at least two electrode layer on top of each other, by        stacking or coating;    -   b) making the vertical ionic channels and the vertical apertures        for the placement of the vertical current collectors connected        to the current collector film of Embodiment 1    -   c) combing the multi layers with the vertical current collector        rods and the current collector film(s),

Embodiment 64

Embodiment 2, where the electrode material is chosen from the group ofLiCoO2, NMC, LiFePO4, NCA, a metal oxide lithium, a metal phosphatelithium, a manganese based electrode, a sulfur based cathode, a carbonbased cathode, an air based cathode, any Li-ion cathode material or anycombination thereof.

Embodiment 65

Embodiment 3, where the electrode material is chosen from the group ofsilicon, carbon based, tin, lithium alloy, aluminum, any li-ion batteryanode material or any combination thereof.

Embodiment 66

Embodiment 1, where the electrode is a cathode of a Mg-ion basedbattery.

Embodiment 67

Embodiment 1, where the electrode is an anode of a Mg-ion based battery.

Embodiment 68

Embodiment 1, where the electrode is a cathode of a Na-ion basedbattery.

Embodiment 69

Embodiment 1, where the electrode is an anode of a Na-ion based battery.

Embodiment 70

Embodiment 1, where the electrode is a cathode of a zinc based battery.

Embodiment 71

Embodiment 1, where the electrode is an anode of a zinc based battery.

Embodiment 72

Embodiment 1, where the electrode is a cathode of an alkaline battery.

Embodiment 73

Embodiment 1, where the electrode is an anode of an alkaline battery

Embodiment 74

Embodiment 1, where the electrode is a cathode of a lead acid basedbattery

Embodiment 75

Embodiment 1, where the electrode is an anode of a lead acid battery.

Embodiment 76

Embodiment 1, where the electrode is a cathode of an air based battery.

Embodiment 77

Embodiment 1, where the electrode is an anode of an air based battery.

Embodiment 78

Embodiment 1 where the said electrode is used in a cell battery case.

Embodiment 79

Embodiment 78 where the cell battery case is a pouch cell, coin cell,prismatic cell or 18650 cell.

Embodiment 80

Embodiment 1 where the said current collector film can be used for thewinding of the electrode of the cell and thus the said current collectorwithstands the tension force during the winding of the cell.

Embodiment 81

Embodiment 1 where there is enough electrolyte between layers to allowdesire rate performance.

Embodiment 81 where the electrolyte can be stored in a porous material

Embodiment 82

Embodiment 1 where the layered cathode is made by a wet processing, asknown in battery electrode industry, being repeated several times tomake the multi layers

Embodiment 83

An electrode for an electrochemical cell including a suspension of about20% to about 75% by volume of an active material and about 0.5% to about8% by volume of a conductive material in a non-aqueous liquidelectrolyte; and

-   -   A current collector film substantially parallel to the said        electrode; and    -   A group of current collector rods substantially perpendicular to        the said current collector film an

Embodiment 85

Embodiment 84 also consisting of a group of high electronic conductivitymesh layers parallel to the electrode and distanced from each other

Embodiment 86

Embodiment 85 where the distance between the mesh layers is more than0.02 mm

Embodiment 87

Embodiment 85 where the parallel mesh network is electronicallyconnected to the network of the perpendicular electronically conductiverods.

Embodiment 88

Embodiment 84 where the network of the perpendicular electronicallyconductive rods is electronically connected to the said currentcollector film.

Embodiment 89

Embodiment 84 where the electrode further comprises at least one groupof high ionic conductivity channels substantially parallel to theelectrode film.

Embodiment 90

Embodiment 84 where the electrode further comprises at least one groupof high ionic conductivity channels substantially perpendicular to theelectrode film

Embodiment 91

Embodiment 89 or 90 where the channels are filled with a solidelectrolyte (ceramic or polymer).

Embodiment 92

Embodiment 89 or 90 where the channels are filled with a porous materialcapable of holding large amounts of liquid electrolyte in it.

Embodiment 93

Embodiment 92 where the porous material is electronically conductivesuch as aluminum, copper, carbon, titanium, nickel, stainless steel,iron, alloys or a combination there of.

Embodiment 94

Embodiment 92 where the porous material is inert inside the cell, suchas polyethylene, polypropylene, PET, pvdf, PTFE. PEO, Etc.

Embodiment 95

Embodiment 84 where the electrochemical cell is a lithium ion based one

Embodiment 96

Electrochemical cell of Embodiment 1 or 84 where the other electrode ofthe cell consists of a group of nano-micro featured rods

Embodiment 97

Embodiment 96 where each of the said nano-micro featured rods consistsof a bundle of smaller rods

Embodiment 98

Embodiment 97 where the smeller rods consist of at least one ofnanowires or nanotubes

Embodiment 99

Embodiment 96 where the diameter of each of the said rods is less than0.5 mm

Embodiment 100

Embodiment 96 where at least one dimension of the said rods is smallerthan 0.2 mm

Embodiment 101

Embodiment 96 where the distance between rods is larger than thediameter of the rods

Embodiment 102

Electrochemical cell of Embodiment 1 or 84 where at least one active,material flows through the cell, for example a flow battery.

In an example, the side view of an electrochemical cell system isillustrated in FIGS. 3A, 6A, 6B, and 7A. The top portion each side viewillustration shows the cathode layers (20), on top of the separatorlayer (30), on top of the anode layers (10). As shown, the cathode iscomprised of cathode active layers (22) separated by auxiliary cathodecurrent collector layers (28) and comprising electrolyte-containinglayers (26) as well as ion-conducting channels (25) that are orientedperpendicular to the cathode active layers. The ion conducting channels(25) and the electrolyte-containing layers (26) form a 3D ionic channelnetwork. The auxiliary cathode current collector layers (28) may each bea 5 μm aluminum mesh, for example. In the example in FIG. 3A, the anodecomprises an auxiliary anode current collector layer (18), which may be,for example, 15 μm of aluminum of 7 μm of copper. FIG. 6A shows anotherexample electrochemical cell system wherein the anode also comprises a3D network of electrically conducting channels. In the example in FIG.6A, both the cathode and anode comprise 3D networks of electricallyconducting channels and current collector layers. Compared to theillustration in FIG. 3A, FIG. 6A shows a cathode further comprisingvertical current collector layers (27). Similarly, the anode (10) isshown as comprising anode active layers (12), horizontal auxiliary anodecurrent collector layers (18), vertical current collector layers (27),electrolyte-containing layers (16), and ion-conducting channels (17). Amain current collector layer (51) is also shown at the bottom of theanode. For example, the anode current collector layers may each be a 1μm thick copper mesh.

In the example electrochemical system illustrated in FIG. 6B, thecathode (20) is comprised of cathode active layers (22) separated byauxiliary cathode current collector layers (28) and comprisingelectrolyte-containing layers (26), vertical ion-conducting channels(25), vertical current collector layers (27), and further comprising acathode main current collector (52) layer. The cathode main collectorlayer (52) may be a 15 μm thick aluminum film. The system may, instead,for example, have only vertical only vertical current collector layersin the cathode electrode, as illustrated in FIG. 10. The verticalcurrent collector layers may be metal rods (77), for example. Thevertical electrolyte-containing layers (26) may be rods of solidelectrolyte, such as formed from polymer or ceramic materials, or rodsof a porous material for holding a significantly large amount of liquidelectrolyte. For example, the anode electrode material may be comprisedof a mix of solid powers of an active material, a binder material, andcarbon-containing conductive material, or, for example, the anodeelectrode material may be comprised of a suspension of active materialsand conductive carbon-containing material in electrolyte (72). Theexample system in FIG. 7A has a cathode electrode comprising asuspension of active materials and conductive carbon in electrolyte (72)and a 3D network of horizontal auxiliary current collectors (28), whichare each a 5 μm thick electronically conductive mesh, and verticalcurrent collector rods (77). In the above examples, the main currentcollector layers (51, 52) allow electrical connection of the system toan external electronic circuit.

In contrast, to the above examples, FIG. 3B illustrates an exampleelectrochemical cell system. The system is comprised of a series ofstacked cathode (22) and anode (12) electrode layers. Within eachelectrode active layer of the multilayer system, there is an auxiliarycurrent collector layer (28, 18), and in between each cathode and eachanode active layer there is a separator (30) layer.

In an example, FIG. 8C shows a current collector layer (52) in the formof a disk, with the auxiliary current collector layer (28) also shown.FIGS. 8D (photograph) and 8E (electron microscope image) show an exampleof a nonwoven polymer layer that may be used as theelectrolyte-containing layer between electrode layers.

FIG. 4B shows a side view of an example cathode electrode of an exampleelectrochemical cell system. The cathode main current collector layer(52) is connected to the auxiliary anode current collector layers (28).

Example 3

3-dimentional current collector for electrochemical and electricalelectrodes

In thick electrodes, a major problem is providing low resistanceelectron conductivity between all areas of the active material and themain current collector (tab) of the said electrode. The inventionprovides various approaches to resolve this problem.

In an embodiment, for example, a three dimensional current collector forelectrochemical cells such as batteries (for example Li-ion, alkaline,zinc ion based, lead acid, Mg ion based batteries, Na ion basedbatteries, flow batteries, air cathode batteries, semi solid batteries),ultracapacitors, supercapacitors and for electrical cells such ascapacitors is introduced.

In an embodiment, for example, the current collector is composed of abase film [first surface] that is substantially parallel to the surfaceof the electrode [in an embodiment this configuration is similar to whatcurrent batteries use, this is also the substrate for electrode activematerial coating] and at least one of the following:

a series of rods substantially perpendicular to the said first surfaceand electronically connected to the said first surface, and/or

a series of films [e.g., series of small films] substantially parallelto the said first surface and electronically connected to it, and alsoelectronically connected to at least a portion of the active electrodematerial, whereas each film of the said series of films can havesubstantially less surface area than the said first surface, and/or

a series of films [e.g., series of large films] substantially parallelto the said first surface and electronically connected to it, and alsoelectronically connected to at least a portion of the active electrodematerial, whereas each film of the said series of films can havesubstantially same surface area as the said first surface.

In an embodiment, for example, the thickness of the said series of smallfilms or series of large films is smaller than the thickness of theactive material coating of the said electrode.

In some embodiments the series of large films or the series of smallfilms are porous, perforated, foam or mesh

In some embodiments the series of large films has the surface area morethan 30% of the surface area of the said electrode active materialcoating. The higher the better, as each large film is inside a coatingof the active material [in some embodiments this configuration issimilar to current collector of Li-ion electrode films, so we wantmaximum contact with the active material].

In some embodiments the series of small films as the surface area lessthan 15% of the surface area of the said electrode active materialcoating. The lower the better [e.g., on top and/or bottom of the activematerial coating. In some embodiments smaller is better so it doesn'tblock the active surface of the active material].

In some embodiments the active electrode material is coated on theseries of large films, one side or two sides.

In some embodiments an electrical conductive adhesive can be used tobetter electronically connect the mentioned layers. The electricalconductive adhesive can be for example silver paste, copper paste,carbon black paste, conductive carbon paste, Graphene paste, nanocarbonpaste or any other electronically conductive electrochemically inactiveadhesive. The paste can be made with slurry of the electrical conductivematerial (carbon based or metals) and a bonder (polyvinylidene fluorideor any other binder) in a solvent (dimethyl carbonate,N-methyl-2-pyrrolidone, acetone, water, dimethyl sulfoxide, or othersolvents of binders).

In some embodiments that electrical conductive adhesive paste can beplaced to electrically connect the said rods to the said series of smallfilms.

An embodiment of Example 3:

Assume “t” thickness, D0 diameter, surface has holes with areapercentage of “Sh”, electrode disk=. Total area of 2 sided electrodefilm is

A0=2Pi/4(1−Sh)D0{circumflex over ( )}2

with N current collector holes in it, each diameter, then the totalcontact surface between current collector rods and the electrode is: “

A1=N.Pi.d.t

If we add a thin washer, ID=d, OD=D, of a porous current collector, withporosity p, to the top and bottom of each rod-hole connections, then theadded surface area of electronic contact is

A2=2N.(1−p).Pi.(D{circumflex over ( )}2-d{circumflex over ( )}2)/4

The new total surface of electronic contact is then

A3=N.Pi[d.t+(1−p)(D{circumflex over ( )}2−d{circumflex over ( )}2)/2]

The ratio of A3/A1 is then

A3/A1=1+(1−p)(D{circumflex over ( )}2−d{circumflex over ( )}2)/(2d.t)

The lost area of the disk due to the washer is

A2/A0=N.(1−p)/(1−Sh).(D{circumflex over ( )}2-d{circumflex over( )}2)/D0{circumflex over ( )}2

p D D T A3/A1 N Sh D0 A2/A0% 0 0.5 0.8 0.15 6.2 5 0 14.2875 0.955261 00.5 0.8 0.15 6.2 5 0.5 14.2875 1.910522 0.5 0.5 0.8 0.15 3.6 5 0.514.2875 0.955261 0 0.5 1 0.15 11 5 0 14.2875 1.837041 0 0.5 1 0.15 11 50.5 14.2875 3.674081 0.5 0.5 1 0.15 6 5 0.5 14.2875 1.837041 0 0.5 1.250.15 18.5 5 0 14.2875 3.214821 0 0.5 1.25 0.15 18.5 5 0.5 14.28756.429642 0.5 0.5 1.25 0.15 9.75 5 0.5 14.2875 3.214821 0 0.5 1.5 0.1527.66667 5 0 14.2875 4.898775 0 0.5 1.5 0.15 27.66667 5 0.5 14.28759.79755 0.5 0.5 1.5 0.15 14.33333 5 0.5 14.2875 4.898775

FIGS. 8A and 8B show a current collector disk (e.g., 52), with pins(metal rods, 77). For example, the pins are 0.5 mm long. A porous smalldisk (78) that may be used as an example mesh current collector layer.

FIGS. 7B-7C show side views of an example electrochemical cell system,particularly illustrating the 3D current collection system within asingle electrode. Electrode active layers (72) are separated byhorizontal auxiliary current collector layers (28). The electrode activelayer (72) material may include silicon, sulfur, tin, lithium, carbon,lithium metal oxides, and lithium metal phosphates, and may furtherinclude binder and carbon-containing conductive materials. Verticalcurrent collector layers (rods or pins, 77) are connected to the primary(horizontal) current collector layer (52) of the electrode, wherein theprimary current collector layer is the layer (tab) that is connected toan external electronic circuit during system operation. FIGS. 9A-9B showside views of another example electrochemical cell system, which furthercomprises electrolyte-containing layers (26). FIGS. 9C-9D show sideviews of another example electrochemical cell system, particularlyillustrating conductive adhesive (80) introduced at the junction of someof the current collector layers (rods, pins, 77) and electrolytecontaining layers (26). The conductive adhesive may include, forexample, carbon black with polyvinylidene, silver paste, or copperpaste.

Example 4: Battery Cells

In an embodiment, the invention provides a method for making batterycells with increased volumetric energy, for example, wherein the methodis based on a new cell architecture allowing to reduce the porosity ofthe electrodes and the ratio of separator to electrodes. In the newarchitecture layers of each electrode, with a current collector in thecenter of the layer, are stacked on each other such that electrolyteexists between the layers. The stack of anode layers and the stack ofcathode layers are parallel with the normal axis of the layersperpendicular to the separator between the stacks.

Making thick electrodes results in higher energy per weight and volume,but the diffusion of ions in thick electrodes gets very resistive. Theelectrodes used in parallel plate batteries have high porosity to allowthicker electrodes and thus reduce the separator to electrode ratio.About 40% of the current electrode films is empty, resulting in veryhigh loss of energy per volume efficiency.

In the an embodiment of the invention, each layer can be a commercialelectrode film or it can be made in-situ by using the pre-preparedmolds.

In the an embodiment of the invention, each layer can be about 50-100 umthick and any length. The width is designed based on the required powerand charging rate. It is estimated that each 100 um width is equivalentto 10 um separator resistance in conventional design. As an example thewidth can be 200 um. The number of layers on top of each other isarbitrary. As an example there can be 10 layers on top of each other.

In the an embodiment of the invention, the battery is chemistry agnosticand thus can be any rechargeable or primary battery. E.g., it can be ali-ion battery, zinc battery, lead acid, or metal air battery.

In the an embodiment of the invention, the cell can further be shapedinto the prismatic or cylindrical shapes, such as 18650.

FIGS. 11-24 illustrate an example electrochemical cell system. FIGS.11A-11C show front, side, and top views, respectively, of anode activelayers (12) with internal auxiliary current collector layers (18). FIGS.12A-12B, and 24 show top views of an example electrochemical cell system(battery) case (100). The case has alternating spaces (110, 120) for theanode electrodes and the cathode electrodes, with the spaces separatedby separator layers (30). The case also has external tabs, or currentcollector layers, for the cathode (125) and anode (115) that allowconnection of the system to an external electronic circuit. Themultilayer electrode system, which is part of an example electrochemicalcell system, is shown in FIG. 13. Stacks of anode active layers (12) andstacks of cathode active layers (22) are each vertically separated by aseparator layer (30) and horizontally by electrolye-containing layers(16, 26) and auxiliary current collector layers (18, 28). An examplesystem is further illustrated with a top view in FIG. 14, wherein anode(12) and cathode (22) active layers are separated by separator layers(30). FIG. 15 further adds to the illustration in FIG. 14 by showing theauxiliary anode (18) and cathode (28) current collector layers extendingbeyond the anode and cathode active layers. FIGS. 16A-16B, 17A-17B,18A-18B, and 19A-19B illustrate side views corresponding to theillustration in FIG. 14, wherein the current collector layers extendbeyond the anode and cathode layers (FIGS. 16A, 17A, 18A, and 19A showan anode stack (A-A cross section), and FIGS. 16B, 17B, 18B, and 19B(B-B cross section) shows a cathode stack). FIGS. 18A-18B further showthe main current collector layers (tabs, 51 and 52) as they areconnected to each internal auxiliary current collector layer (18, 28).FIGS. 19A-19B further show the anode (A) and cathode (B) electrodeassemblies within an electrochemical cell system case (100), with anodeand cathode corresponding collector current tabs (115 125,respectively).

FIGS. 21-23 show front views of example electrochemical cell systems.The FIGS. 21-23 shows multi-layered electrode cells, with many (e.g.,25) individual active electrode layers stacked in the x-direction withineach multi-layered electrode cell. The series of multi-layered anode andcathode electrodes may extend farther in the y-direction, asillustrated, to fit allow an electrochemical system with a predeterminednumber of electrode stacks/assemblies. FIG. 21 illustrates a top view,underneath the case (100), illustrated the network of auxiliary currentcollector layers corresponding to the anode (18, 51) and cathode (28,52), which are then connected to the anode tabs (115) and cathode tabs(125), of the case (100), respectively. FIGS. 21-23 show front views ofsystem between the case (100) and the internal cell layers. The systemcomprises isolation layers (150) on top and bottom of theelectrochemical cell system, which isolate the main current collectorlayers (51, 52) from the rest of the layer of the system. FIG. 24 showsan electrochemical system case (100) with primary current collectors(115, 125). The anode spaces are electronically connected to the anodeprimary current collector and the cathode spaces are electronicallyconnected to the cathode primary current collector.

In an embodiment, for example, the separator (30) between the anode andcathode is continuous, for example a single layer of celgard in a wavyform separating many layers of stacked anode and cathode regions. (e.g.,a Sine wave where anode and cathode are separated by the sine wave,which is the separator here)

Example 5: Novel Chemistry Agnostic Methods to Make ElectrochemicalCells Such as Batteries

As used herein “electric conductivity” is inclusive of both ion movement(ionic conductivity) and electron movement (electronic conductivity).Ionic conductive refers to movement or transport of ions and electronicconductivity refers to movement or transport of electrons. For clarity,ionically conductive materials may be characterized as electricallyconductive, but not all electrically conductive are ionicallyconductive. For clarity, electronically conductive materials may becharacterized as electrically conductive, but not all electricallyconductive materials are electronically conductive.

In an embodiment, for example, the batteries are zinc based or lithiumbased or lead based. Certain embodiments are chemistry agnostic, andthus applicable to virtually any battery chemistry.

The size (any of the 3 spatial dimensions) of the cells may be onenanometer (1 nm) up to tens of centimeters (e.g., 20 cm). The diameterof the current collector rods can be from 10 nm to 1 cm. The height ofthe rods can be 10 nm up to 10 cm. The current collector rods can beporous, up to 50%. The current collector rods can be comprised of activematerials, current collectors and binders materials and conductivecarbon. The current collector rods can be made by different methodsincluding slurry injection into molds, coating methods, electrophoresismethods or by semiconductor fabrication methods.

In an embodiment, the invention provides novel methods to makeelectrodes for electrochemical cells such as batteries such that theelectrode consists of a film consisting of a current collector (Al, Cu,Ti, Stainless steel, Ni, any carbon types) and active materials.

In an embodiment, the electrochemical systems of the invention comprisean array of current collector rods, each consisting of at least one ofthe active materials and current collector material, such that each ofthe current collector rods is perpendicular to the said film, and suchthat the active material of the film and the active material of thecurrent collector rods are in direct electronic communication. In anembodiment, for example, each of the current collector rods is itself acombination of smaller features such as smaller rods. In an embodiment,for example, each current collector rod has a diameter in the range of10 nm and 1 cm. In an embodiment, for example, each of the currentcollector rods is further comprised of nano features (e.g., havingphysical dimension ranging from 1 to 1000 nm), such as nano rods.

An aspect of the invention is implementation to provide the currentcollector connections from the plate and current collector rodelectrodes to the main current collector tabs (51, 115, 52, 125)outside.

Below are described exemplary features of systems of the invention andcomponents thereof.

Rod Electrodes:

In an embodiment, the rod electrode array is generated via a methodcharacterized by: using a mold with open through holes and a porousinsulating material on one end, applying the viscous active materialslurry, for example carbon or silicon, from the fully open side withsome pressure, the rod array is cast. Later, after dissolving thesilicon mold, an electronically conductive layer (thin film, mesh,porous or perforated) is deposited on one end as the current collector.In an embodiment, for example, the porous non-conductive layer isreplaced with a porous conductive layer (copper for anode, aluminum forcathode), which then can be used as the current collector itself. Anadvantage of this approach is that it removes a time consuming step, butalso as the active material will be inside the porous conductive layerattached to the rods, it will make the connection between the rods andcurrent collector very stable, addressing the problem of delamination ofrods from current collector that others have. The present systems canalso use aluminum mold or PMMA mold or PDMS mold instead of siliconmold, which makes the fabrication less expensive because silicon moldsare made by lithography but aluminum molds, for example, are made bysimple CNC (computer numerical control) machining of thin (e.g., 0.5 mmthick) aluminum films. Another benefit here is that once we removealuminum mold from the array by etching (for example, via a KOHsolution) the residue of the etched aluminum on the active material rodscan be an insulating layer, acting as the separator itself. In anexample, this approach may be extended to be the primary separator,which may eliminate the separate step of making the separator layer.

Plate Electrodes:

In an embodiment, a few conductive rods (less than 10% of the holes) areprovided through the holes of plates as the current collector for theplates. so at least 90% of the rods going through the holes are anodearray, and 10% or less is the current collector for the plates. Thesecurrent collector rods can be connected to a tab plate on at least oneside of the battery cell, which then will act as the positive tab.

Conformal Coating of Separator on the Cathode Perforated Layer Stack.

In this example, a mixture of inactive particles, such as glass beads,Al2O3, SiO2 are linked by a bonder such as PVDF in a solvent such asacetone, organic solvents or ethanol was used. The ratio of theparticles to the PVDF can vary from 0.1 to 10. The size of the particlesis less than 1 μm. The concentration can vary depending on thetemperature and speed of the process from 1 wt % to 10% wt %.

The stack of cathode perforated layers was dip coated in the solutionand kept there for 1 second. The exposed aluminum was masked by tape.Then, the stack was pulled out from the solution and was dried andheated at 80° C. to cure the monomer. To completely cover the surface,the process was repeated twice in this example.

Conformal Coating of Separator on the Anode Rods Array:

In this example, a mixture of in active particles, such as glass beads,Al₂O₃, SiO₂ are linked by a bonder such as PVDF in a solvent such asacetone, organic solvents or ethanol was used. The ratio of theparticles to the PVDF can vary from 0.1 to 10. The size of the particlesis less than 1 μm. The concentration can vary depending on thetemperature and speed of the process from 1 wt % to 10% wt %.

The array of rods was dip coated in the solution and kept there for 1second. Any exposed copper current collector was masked by tape. Thenthe stack was pulled out from the solution and was dried and heated at80° C. to cure the monomer. To completely cover the surface, the processwas repeated twice in this example.

Current Collector for the Rods Array:

In this example, the current collector for the rods can be a thin plateof current collector material, such as Ni, Cu, Al, Ti, Carbon, stainlesssteel. The thickness can be a few micrometers to hundreds ofmicrometers. The plate can be a thin film or a mesh or perforated.

FIGS. 25-31 provide schematic illustrations of electrochemical systemsof the invention and components thereof.

FIGS. 25A and 25D show the side view and top view, respectively, of anarray of rod electrodes on top of a substrate electrode. The rodelectrodes are oriented substantially perpendicular to the substrate.FIGS. 25B and 25C show side and top views, respectively, of an exampleindividual rod electrode illustrating that each rod electrode may becomprised of a bundle of smaller rods having features with sizedimensions on the order of nanometers of micrometers. The substrate maybe the current collector (mesh, grid or thin film). The substrate mayalso be a planar electrode itself, the substrate electrode, integratedwith the current collector and active material.

FIGS. 26-31 are a series illustrating the components and features of anelectrochemical system with rod electrode arrays. As shown in FIG. 26,the rod electrodes may extend from either side of the substrate,substantially perpendicular to the substrate. FIG. 26 (right) shows thateach of the each of the rods can have fibers in it to improve themechanical performance, via reinforcement with stronger materials, anddurability, for ease of fabrication, or for improving the electronicconductivity, in which case they may be made of metals such as Al, Cu,steel, Ti or carbon materials such as carbon fibers or carbon nanotubes.The fibers may be the auxiliary current collectors. The fibers can havediameters of about 1% to 20% of the diameter of the rod. The length canbe 0.01× to 100× of the rod length. A fiber length greater than the rodlength rod length means that the fibers are bent to fit inside the rod.The fibers can also be made of polymers to increase the ionicconductivity or improve shape change accommodation (i.e., flexiblefibers). FIG. 27 shows side and top views illustrating auxiliary currentcollectors, or current collector material, and the rod electrodes. Asillustrated in FIG. 27, the auxiliary current collectors may be internalto the rod electrodes and there may also be a current collector plateinternal to the substrate electrode. The auxiliary current collectorsand the current collector plate are connected to a primary currentcollector tab, which allows connection of the electrochemical system toan external electronic circuit. A fraction of the current collectors maybe exposed, rather internal to a rod electrode, so allow electronicconnection to a primary current collector tab. FIG. 28 shows top andside views of the rod electrode array with a secondary separatormaterial or solid electrolyte. The secondary separator may be anionically conductive conformal coating on the rod electrodes. (FIG. 28shows the secondary separator coating on only several of the rodelectrodes for illustration, but the secondary separator coating may bepresent on all of the rod electrodes in the array.) FIG. 29 shows topand bottom views of the electrochemical system after the introduction ofprimary separator layers in between the rod electrodes. The primaryseparator layer may be a perforated plate (as shown in FIG. 29 on theright) fit through the rod electrodes or a coating deposited via methodssuch as CVD, PVD, or dip coating, for example. The primary separatorlayer may be ionically conductive and may be made of a differentmaterial than the secondary separator layer. FIG. 30 shows anelectrochemical system after the introduction of plate electrodes. Theplate electrodes may be an electrode of an opposite polarity to that ofthe rod electrodes, for example, the rod electrodes may be the anodeelectrode and the perforated plate electrodes may be the cathodeelectrode. The perforated plate electrode top view is shown on theright, where the holes line up with the rod electrodes. The perforatedplate electrode of this embodiment may be made of Zn or Li, for example.FIG. 31 shows an electrochemical system after the introduction of aplate electrode current collector. The plate electrode current collectormay be connected to all or a fraction of the perforated plateelectrodes, or to a fraction of the auxiliary current collectors, ordepending on the polarity of the electrochemical system. The plateelectrode current collector allows connection of the electrochemicalsystem to an external electronic circuit.

Example 6: Novel Electrochemical Cells, Such Li-Ion Batteries

In an embodiment, for example, the length and width of the plates can beseveral millimeters or centimeters and 0.01 to 10 mm in thickness. Theholes in the cathode can be several nanometers or up to severalmillimeters. The anode rods can be several micrometers thick and up toseveral millimeters long. The rod base can be a current collector (e.g.,copper) and can be a few micrometers to a few millimeters thick.

FIGS. 32-57 provide schematic illustrations of electrochemical systemsof the invention and components thereof. FIG. 32 shows side and topviews of an example perforated cathode plate that may be used in anexample electrochemical system. The perforated cathode plate may vary inshape, for example, circular or rectangular. FIG. 33 illustrates sideand top views of an example perforated cathode plate further comprisingguide holes, which aid in alignment of the perforated cathode plate withthe rest of the electrochemical system. For example, FIG. 33 alsoillustrates a current collector plate, comprising alignment guide rodsthat are intended to fit through the guide holes in the perforatedcathode plate. FIG. 34 illustrates a rod electrode array, wherein thecorresponding electrode may be the anode, for example, and the substrateelectrode to which the rod electrodes are connected in a substantiallyperpendicular orientation. The example rod electrodes may be, forexample, made of silicon and formed using various process, such aschemical vapor deposition (CVD), physical vapor deposition (PVD), wetetching, or dry etching, for example. The example rod electrodes mayalso comprise a silicon coating on a rods formed of a differentmaterial, such as carbon (e.g., nanocarbon pillars). FIG. 35 illustratesan array of rod electrodes, on top of a substrate electrode, afterdeposition of a separator layer. In the embodiment of the components ofthe electrochemical system in FIG. 35, the separator layer may be anelectronically non-conductive material coating made of, for example,porous PVDF, polyethylene, polypropylene, or a solid electrolyte such aslithium phosphorous oxy-nitride (LIPON), lithium super ionic conductor(LISICON, Li_(2+2x)Zn_(1-x)GeO₄), or poly(ethylene oxide) (PEO), forexample. The separator layer coating may be deposited on the rodelectrodes via various coating processes such as, for example, dipcoating from a solution of materials, spray coating of monomeric orpolymeric solutions (with solvent such as n-methyl-2-pyrrolidone (NMP)),CVD, PVD, or electrophoretic deposition. FIG. 36 illustrates anotherperspective of the rod electrode array and substrate electrode system.FIG. 36 also shows a photograph of silicon nanomaterials, includingpowder, rods, and tubes, from which the rod electrode may be formed.Example methods of making silicon rod arrays are also discussed andillustrated in the following references: (i) “Silicon Decorated ConeShaped Carbon Nanotube Clusters for Lithium Ion Battery Anodes.” W.Wang, et al., Small, 10 (16), 2014, pg. 3389-3396; (b)http://cheaptubes.com; (c) http://www.oulu.fi/infotech/ (silicon coatingon carbon nanotubes); (d) http://www.mtixtl.com/copperfoil.aspx (silicongrowth on porous metal substrate); (e) “Freestanding Macroporous Siliconand Pyrolyzed Polyacrylonitrile As a Composite Anode for Lithium IonBatteries.” M. Thakur, et al. Chem. Mater., 24 (15), 2012, pg.2998-3003; (f) http://www.nexeon.co.uk/ (silicon rod growth); and (g)http://www.amprius.com/ (silicon rod growth).

FIGS. 37-51 illustrate example aspects and components of anelectrochemical system in the present invention. FIG. 37A shows a rodelectrode array, for example an array of anode rods, with a secondaryseparator coating and a primary separator film present, fitted into theperforated cathode plate electrode. The perforated electrode is not inphysical contact with the rod electrodes due to the presence of theseparator layers in between. FIG. 37B shows that the assembly in FIG.37A may be stacked such that two equivalent anode-separator-cathodeassemblies are aligned with the anode rods facing the anode rods of theother assembly. The secondary and primary separator layers may beassumed to be present on the rod electrodes, even if not include in theillustration in FIGS. 37-51, for the purpose of cleanliness. FIG. 38illustrates the addition of auxiliary current collectors to collectcurrent from the corresponding electrode, anode or cathode, and whichmay be connected to a primary current collector tab. The auxiliarycurrent collector is added in between the rod electrodes of the top andbottom electrode assembly, as shown. FIG. 39 illustrates that anauxiliary lithium metal film may be added in a similar fashion as theauxiliary current collector of FIG. 38. The auxiliary lithium metal filmmay be used as a reference electrode, and may be connected to a primarycurrent collector tab. FIGS. 40-42 illustrate another embodiment of theelectrochemical system similar to that illustrated in FIGS. 34-39,except wherein the rod electrodes are connected to the substrateelectrode on opposite sides of the substrate electrode, and orientedsubstantially perpendicular to the substrate. FIG. 41 shows that thedouble-side rod electrode array may be fitted into cathode perforatedplate electrodes on both sides where the rod electrodes extend from thesubstrate. FIG. 42 illustrates that the assembly in FIG. 41 may bestacked.

FIGS. 43-51 illustrate example assemblies of example completeelectrochemical system using electrode assemblies such as those shown inFIG. 41. FIG. 43 illustrates the components an electrochemical cellsystem. The example electrochemical cell system is comprised ofpositive, cathode current collectors (e.g., Al) electronically connectedto the cathode perforated plate electrode. In this example, the cathodecurrent collectors are electrically insulated (ionically andelectronically insulated) from the anode rod electrodes, the anodesubstrate electrodes, and the negative, anode current collectors via anelectrically (ionically and electronically) insulating material, such asan insulating polymer. The system in FIG. 43 also comprises negative,anode current collectors (e.g., Cu) electronically connected to theanode rod electrodes and/or the anode substrate electrodes. In thisembodiment of the electrochemical system, the cathode electrode may be aperforated plate electrode made of lithium cobalt oxide (LCO), lithiumiron phosphate (LFP), or sulfur, for example, or a solid electrolyte.Primary and secondary ionically conductive separator layers are alsopresent between the anode and cathode electrodes. In the example in FIG.43A, an electrolyte may also be used, in solid or liquid form, betweenthe anode and cathode electrodes. FIG. 43B shows some example shapes ofthe electrochemical cell cross-section views. FIG. 44 illustrates thatthe electrochemical cell in FIG. 43A may be stacked and arranged in aparallel fashion to form a multi-cell electrochemical system. The stackof cells, as illustrated in FIG. 44, form an encased electrochemicalsystem, with the positive and negative current collectors on the sides,top, and bottom, being the system case walls. FIG. 45 illustrates thatelectrochemical system may include shared anode and cathode currentcollector rods, wherein the shared current collector rods areelectronically connected to the respective electrode current collectorslocated internal to the electrochemical cell. The shared electrodecurrent collector rods may extend outside of the internal volume of theelectrochemical cell, and may be connected to the respective primarycurrent collector tab. As shown, in FIG. 45, the shared cathodecollector rod is electrically insulated from the anode current collectorlayers via an electrically insulating material, such as a polymer. FIG.45B illustrates an example cross section view of the electrochemicalcell in FIG. 45A, showing the arrangement of the shared electrodecurrent collector rods. FIG. 46 illustrates that the cells illustratedin FIG. 45 may be stacked in a parallel arrangement forming an encasedelectrochemical system, such as a battery. FIG. 46A shows anotherembodiment of the stacked electrochemical cell system wherein sharedcurrent collector rods are electronically connected to the respectiveinternal electrodes (e.g., anode rod electrodes or cathode perforatedplate electrodes), with the only the cathode shared current collectorrod being external and in electronic communication with the positive,cathode current collectors (sides as illustrated), in which case theanode current collectors at the top or bottom of the stack are connectedto an anode primary current collector tab. FIG. 46B illustrates astacked electrochemical system with a shared external positive, cathodecurrent collector rod. FIG. 47 illustrates another example encasedelectrochemical cell system with an individual external positive,cathode current collector that is electrically insulated from othercurrent collectors. FIG. 48 illustrates another embodiment of theelectrochemical cell wherein the negative, anode current collector isonly on one side (e.g., the bottom), not the top and bottom, of thecell, as oriented in the illustration, and is electrically insulatedfrom the positive, cathode current collectors (e.g., sides). A positive,cathode current collector is position a side opposite (e.g., top) fromthe negative, anode current collector, and is in electroniccommunication to the other positive, cathode current collectors (e.g.,sides), and electronically insulated from the anode electrodes. FIG. 48Bshows a top view of the electrochemical cell in FIG. 47A, illustratingthat there are no electrode shared current collector rods external tothe encased electrochemical system. FIG. 49 illustrates a stack ofelectrochemical cells arranged in series, instead of in parallel. FIG.49B again illustrates that there are no external shared electrodecurrent collector rods; instead, the top and bottom of the encasedelectrochemical system may serve the same role as primary currentcollector tabs, allowing connection to an external electronic circuit.FIG. 50 shows another embodiment of an electrochemical cell, wherein thecell of FIG. 48 may incorporate shared current collector rods for theanode and cathode electrodes. FIG. 51 illustrates that the encasedelectrochemical systems (e.g., those illustrated in FIG. 44, 46, or 49)may have different shapes (e.g., rectangular, circular, ellipsoidal) andmay be arranged in parallel or in series.

Example 7: Novel Electrodes and Electrochemical Cells

This Example provides a description of electrochemical systems of theinvention (and components thereof) and methods of making and using.

Method 1: An electrode of an electrochemical cell (such as a Li-ionbattery) such that the electrode is composed of a suspension of activematerial powder (nano or micro size of features) materials (such as NMC,sulfur, silicon, zinc, zinc oxide, LiCoO2, LiFePO4, carbon, NCA or anycombination thereof), conductive fillers (nano or micro) materials (suchas carbon) and at least one layer of foam, mesh or perforated sheet ofelectronically conductive materials (copper, copper coated with metaloxides, stainless steel, titanium, aluminum, nickel, chromium, tungsten,metal nitrides, metal carbides, carbon, carbon fiber, graphite,graphene, carbon mesh, conductive polymers, or combinations of the above(including multi-layered structures) in a liquid or gel electrolyte(such as 1M LiPF6 in PC-EC 1:1). The layer(s) of electronicallyconductive materials create at least one path for conducting electronsbetween the said electrode and the outside of the cell as in charge ordischarge of the cell; each layer is parallel to the plane of the activematerials. The electrode may have a current collector film (porous ornon-porous) at one end, which is connected to an outside tab of thepositive or negative poles. The thickness of each current collectorlayer can be between 5 μm to 500 μm. The thickness of the totalelectrode can be 10 μm to 1 cm. The thickness of the conductiveinterlayers can be between 5 nm and 1 mm. The conductive middle layerscan have an electronic path to the outside tab of the said electrode,such as through the main current collector film.

Method 2: An electrode of an electrochemical cell (such as a li-ionbattery) such that the electrode is composed of a mix of active materialpowder (nano or micro size or features) materials (such as NMC, sulfur,Silicon, Zinc, Zinc Oxide, LiCoO2, LiFePO4, Carbon, NCA or anycombination thereof), conductive fillers (nano or micro) materials (suchas carbon) and at least one layer of foam, mesh or perforated sheet ofelectronically conductive materials (copper, copper coated with metaloxides, stainless steel, titanium, aluminum, nickel, chromium, tungsten,metal nitrides, metal carbides, carbon, carbon fiber, graphite,graphene, carbon mesh, conductive polymers, or combinations of the above(including multi-layered structures) in a solid electrolyte matrix (suchas LISICON). The layer(s) of electronically conductive materials createat least one path for conducting electrons between the said electrodeand the outside of the cell as in charge or discharge of the cell; eachlayer is parallel to the plane of the active materials. The electrodemay have a current collector film (porous or non-porous) at one end,which is connected to an outside tab of the positive or negative poles.The thickness of each current collector layer can be between 5 μm-500μm. The thickness of the total electrode can be 10 μm−1 cm. Thethickness of the conductive interlayers can be between 5 nm-1 mm. Theconductive middle layers can have an electronic path to the outside tabof the said electrode, preferably through the main current collectorfilm.

Method 3: An electrochemical cell (such as Li-ion cell) in which atleast one electrode is composed of a suspension of active materialpowder (nano or micro size or features) materials (such as NMC, sulfur,Silicon, Zinc, Zinc Oxide, LiCoO2, LiFePO4, Carbon, NCA or anycombination thereof), conductive fillers (nano or micro) materials (suchas carbon) and at least one layer of foam, mesh or perforated sheet ofelectronically conductive materials (copper, copper coated with metaloxides, stainless steel, titanium, aluminum, nickel, chromium, tungsten,metal nitrides, metal carbides, carbon, carbon fiber, graphite,graphene, carbon mesh, conductive polymers, or combinations of the above(including multi-layered structures) in a liquid or gel electrolyte(such as 1M LiPF6 in PC-EC 1:1). The layer(s) of electronicallyconductive materials create at least one path for conducting electronsbetween the said electrode and the outside of the cell as in charge ordischarge of the cell; each layer is parallel to the plane of the activematerials. The electrode may have a current collector film (porous ornon-porous) at one end, which is connected to an outside tab of thepositive or negative poles. The thickness of each current collectorlayer can be between 5 μm and 500 μm. The thickness of the totalelectrode can be 10 μm to 1 cm. The thickness of the conductiveinterlayers can be between 5 nm and 1 mm. The conductive middle layerscan have an electronic path to the outside tab of the said electrode,preferably through the main current collector film.

Method 4: An electrochemical cell (such as Li-ion cell) in which atleast one electrode is composed of a mix of active material powder (nanoor micro size or features) materials (such as NMC, sulfur, Silicon,Zinc, Zinc Oxide, LiCoO2, LiFePO4, Carbon, NCA or any combinationthereof), conductive fillers (nano or micro) materials (such as carbon)and at least one layer of foam, mesh or perforated sheet ofelectronically conductive materials (copper, copper coated with metaloxides, stainless steel, titanium, aluminum, nickel, chromium, tungsten,metal nitrides, metal carbides, carbon, carbon fiber, graphite,graphene, carbon mesh, conductive polymers, or combinations of the above(including multi-layered structures) in a solid electrolyte matrix (suchas LISICON). The layer(s) of electronically conductive materials createat least one path for conducting electrons between the said electrodeand the outside of the cell as in charge or discharge of the cell; eachlayer is parallel to the plane of the active materials. The electrodemay have a current collector film (porous or non-porous) at one end,which is connected to an outside tab of the positive or negative poles.The thickness of each current collector layer can be between 5 um-500um. The thickness of the total electrode can be 10 um-1 cm. Thethickness of the conductive interlayers can be between 5 nm-1 mm. Theconductive middle layers can have an electronic path to the outside tabof the said electrode, preferably through the main current collectorfilm.

Method 5: An electrode of an electrochemical cell (such a Li-ion) suchthat the electrode consists of at least two different electrochemicallyactive material materials on a substrate. The substrate can be a currentcollector. In some embodiments one electrochemically active material islithium metal. In some embodiments another electrochemically activematerial is silicon. In some embodiments the silicon has nano features(such as nanowires). In some embodiments the two active materials aredistributed with an arbitrary pattern. In some embodiments the lithiumis in the form of cylinders; in some embodiments the rods areperpendicular to the surface of the current collector. In someembodiments each lithium rod is surrounded by a group of siliconnanowires. In some embodiments the lithium can be used for prelithiationof any electrodes of the cell. In some embodiments the different activematerials have separate external tabs. In some embodiments an appliedvoltage or current between the external lithium tab and the tab of anyof the electrodes of the cell are used do release lithium ions from thelithium metal material in the electrolyte or any of the electrodes.

Method 6: An electrode for an electrochemical cell (such as Li-ionbattery) in which the electrode consists of a group of nanostructuredactive material (such as silicon nanowire) on a substrate such that theactive material is submerged with a mixture of electrolyte (such asnon-aqueous Li-ion electrolyte or a suspension of solid electrolyteparticles in a non-aqueous electrolyte) and conductive fillers (such ascarbon black).

Method 7: An electrode for an electrochemical cell (such as li-ionbattery) in which the electrode consists of a group of nanostructuredactive material (such as silicon nanowire) on a substrate such that theactive material is submerged in an electrolyte (such as non-aqueousli-ion electrolyte or a suspension of solid electrolyte particles in anon-aqueous electrolyte) and at least one layer of conductive material(such as a perforated metal film, metal mesh, metal foam, materials suchas Al, Cu, Ni, Fe, Ti, Silver, Gold). The conductive layers are parallelto the substrate. The conductive layers provide additional electronicconductivity for the said electrode and in some embodiments can beelectronically connected to the external tab of the said electrode.

Method 8: An electrochemical cell (such as Li-ion) in which the anode ismade of a combination of a nano-featured active material (such asnanowire silicon) with a conformal solid electrolyte around them (suchas LIPON, LISICON or gel or polymer such as PEO electrolytes) andlithium metal (such as lithium wires surrounded by and parallel tosilicon nanowires) perpendicular to an anode current collectorsubstrate; the cathode is made of a suspension of active materials (suchas NMC or LiFePO4 powder) and conductive carbon particles in anon-aqueous electrolyte. In some embodiments the anode nano-featuredactive material is coated on a substrate with nano-features. In someembodiments the cathode has at least one perforated or porous film ormesh or foam current collector. In some embodiments the lithium wireshave an external tab that can be used with any of the anode (for examplesilicon nano wires) or cathode tabs to provide lithium ions into thecell for prelithiation or for preventing capacity loss.

Method 9: An electrochemical cell (such as Li-ion) in which the anode ismade of a combination of a Nano-featured active material (such asnanowire silicon) and lithium metal (such as lithium wires surrounded byand parallel to the nanowires) perpendicular to an anode currentcollector substrate and in a suspension of conductive carbon particlesin a first non-aqueous electrolyte); the cathode is made of a suspensionof active materials (such as NMC or LiFePO4 powder) and conductivecarbon in a second non-aqueous electrolyte. In some embodiments theanode nano-featured active material is coated on a substrate withnano-features.

FIG. 52 illustrates an example electrochemical cell system of someembodiments. For example, the electrochemical cell dimensions may be 20cm×5 cm×1 mm total, and comprising 10 electrode plates. For example, thecathode electrodes may be made of semi-solid NMC, the electrolyte may bea gel-polymer, and the anode electrodes may be made of Si—Li wires. Theelectrochemical system illustrated in FIG. 52 includes silicon nanowires coated on carbon nano or micro wires on a correct collector,perforated aluminum films as cathode current collectors, and lithiumwires. A larger electrochemical cell may be made by stacking layers ofsilicon nanowires (with a solid electrolyte shell) on substrate layers(can have nanowires on both sides) on top of each other. Continuouslithium wires can be made by holes made in the silicon layers. Layers ofperforated aluminum films may be placed between the anode layers and tofill the empty spaces with the suspension of the cathode active materialand conductive carbon in the non-aqueous electrolyte.

The said electrochemical cell of some embodiments can be provided in aspiral wound format or a Bobbin format.

Example 8: Experimental-Thick Electrode

FIGS. 53A-D show the components of an example coincell-typeelectrochemical system with a multi layered electrode using a 500 μmthick electrode array and an auxiliary current collector/aligner system.

FIG. 53A shows the aluminum 3-dimentional auxiliary current collectorplaced inside a 2032-type coin cell cup, which also serves as alignerfor the perforated plates. The current collector/aligner consists of athin circular disc with five protruding cylindrical posts havingdiameter of 500 μm and height of 550 μm. In an example method, the postsare machined to high precision in order to make electrical contact withthe edges of the holes while providing sufficient alignment. Thediameter and position of the posts must match the diameter and positionof the holes.

FIG. 53B shows one of the layers of the multilayer electrode, consistingof perforated active material, which is coated on an auxiliary currentcollector plate. The double layer made by the active material coated onthe auxiliary current collector plate has hole diameter 500 μm andcenter to center hole spacing 1000 μm. It further shows the alignment ofthe holes in each of the layers of the multilayered electrode with theposts of the auxiliary current collector-aligner, providing theelectronic connectivity between each of the active material layers andthe main current collector plate, through the passage of electrons fromthe active material layer, the adjacent auxiliary current collectorlayer and the auxiliary current collector pins (rods). In an example,the active material coating consists of 90% LiCoO2, 5% conductive carbonand additives, and 5% PVDF binder. The thickness of the coating is about0.050 mm, for example, and the thickness of the auxiliary currentcollector is about 0.010 mm, for example, in this experiment. FIG. 53Cshows a thin porous spacer that will hold the liquid electrolyte toprovide sufficient ionic connectivity between the layers. This layer maybe a woven or nonwoven layer, but is has to have a high porosity. Otherperforated layers of active material, auxiliary current collector plateand spacer, are added to produce a multi layered electrode in thishalf-cell example. FIG. 53D shows the addition of a Celgard separatorlayer, which will complete the half-cell construction by placing theaddition of the Li electrode on the other side of it.

FIG. 54 provides a plot of capacity (mAh/g) vs. cycle numberillustrating the results of Coincell 2032 testing of half-cells made asdescribed in the above discussion of FIGS. 53A-D. The electrolyte may bea commercial Li-ion electrolyte. Specific Maximum spacing between theconduits was about 1 mm. The experiment was performed in roomtemperature. The experimental data, shown in FIG. 54, demonstrated thatthe electrode delivered more than 90% of the theoretical capacity at C/6rate, which is a significant improvement compared to same thickness anddensity made without the auxiliary current collector, or without theelectrolyte channels (i.e., reference commercial one layer LiCoO2half-cell).

FIG. 55 shows a plot of voltage (v) vs. capacity (mAh/g) of CR2032half-cell testing at C/6 rate, specifically showing the 1^(st) and5^(th) cycles of a coincell of the present example (“layered cell”) andthe 1^(st) and 5^(th) cycles of a reference commercial cell: two layeredcathode cell with 500 μm holes and 1000 μm center to center spacingcompared to a reference LiCoO₂ cell using the same electrode foil. Thereference cell was made with a commercial electrode film. The voltagevs. capacity performance of the example cell of the present invention,as described in FIG. 53, performed similarly to the reference cell thatis three times thinner (example, layered cell thickness is 3× of thereference cell).

STATEMENTS REGARDING INCORPORATION BY REFERENCE AND VARIATIONS

All references cited throughout this application, for example patentdocuments including issued or granted patents or equivalents; patentapplication publications; and non-patent literature documents or othersource material; are hereby incorporated by reference herein in theirentireties, as though individually incorporated by reference, to theextent each reference is at least partially not inconsistent with thedisclosure in this application (for example, a reference that ispartially inconsistent is incorporated by reference except for thepartially inconsistent portion of the reference).

The terms and expressions which have been employed herein are used asterms of description and not of limitation, and there is no intention inthe use of such terms and expressions of excluding any equivalents ofthe features shown and described or portions thereof, but it isrecognized that various modifications are possible within the scope ofthe invention claimed. Thus, it should be understood that although thepresent invention has been specifically disclosed by preferredembodiments, exemplary embodiments and optional features, modificationand variation of the concepts herein disclosed may be resorted to bythose skilled in the art, and that such modifications and variations areconsidered to be within the scope of this invention as defined by theappended claims. The specific embodiments provided herein are examplesof useful embodiments of the present invention and it will be apparentto one skilled in the art that the present invention may be carried outusing a large number of variations of the devices, device components,methods steps set forth in the present description. As will be obviousto one of skill in the art, methods and devices useful for the presentmethods can include a large number of optional composition andprocessing elements and steps.

When a group of substituents is disclosed herein, it is understood thatall individual members of that group and all subgroups are disclosedseparately. When a Markush group or other grouping is used herein, allindividual members of the group and all combinations and subcombinationspossible of the group are intended to be individually included in thedisclosure. Additionally, unless otherwise specified, all isotopicvariants of compounds disclosed herein are intended to be encompassed bythe disclosure. For example, it will be understood that any one or morehydrogens in a molecule disclosed can be replaced with deuterium ortritium. Isotopic variants of a molecule are generally useful asstandards in assays for the molecule and in chemical and biologicalresearch related to the molecule or its use. Methods for making suchisotopic variants are known in the art. Specific names of compounds areintended to be exemplary, as it is known that one of ordinary skill inthe art can name the same compounds differently.

It must be noted that as used herein and in the appended claims, thesingular forms “a”, “an”, and “the” include plural reference unless thecontext clearly dictates otherwise. Thus, for example, reference to “acell” includes a plurality of such cells and equivalents thereof knownto those skilled in the art, and so forth. As well, the terms “a” (or“an”), “one or more” and “at least one” can be used interchangeablyherein. It is also to be noted that the terms “comprising”, “including”,and “having” can be used interchangeably. The expression “of any ofclaims XX-YY” (wherein XX and YY refer to claim numbers) is intended toprovide a multiple dependent claim in the alternative form, and in someembodiments is interchangeable with the expression “as in any one ofclaims XX-YY.”

Unless defined otherwise, all technical and scientific terms used hereinhave the same meanings as commonly understood by one of ordinary skillin the art to which this invention belongs. Although any methods andmaterials similar or equivalent to those described herein can be used inthe practice or testing of the present invention, the preferred methodsand materials are now described. Nothing herein is to be construed as anadmission that the invention is not entitled to antedate such disclosureby virtue of prior invention.

Whenever a range is given in the specification, for example, atemperature range, a time range, or a composition or concentrationrange, all intermediate ranges and subranges, as well as all individualvalues included in the ranges given are intended to be included in thedisclosure. As used herein, ranges specifically include the valuesprovided as endpoint values of the range. For example, a range of 1 to100 specifically includes the end point values of 1 and 100. It will beunderstood that any subranges or individual values in a range orsubrange that are included in the description herein can be excludedfrom the claims herein.

As used herein, “comprising” is synonymous with “including,”“containing,” or “characterized by,” and is inclusive or open-ended anddoes not exclude additional, unrecited elements or method steps. As usedherein, “consisting of” excludes any element, step, or ingredient notspecified in the claim element. As used herein, “consisting essentiallyof” does not exclude materials or steps that do not materially affectthe basic and novel characteristics of the claim. In each instanceherein any of the terms “comprising”, “consisting essentially of” and“consisting of” may be replaced with either of the other two terms.

One of ordinary skill in the art will appreciate that startingmaterials, biological materials, reagents, synthetic methods,purification methods, analytical methods, assay methods, and biologicalmethods other than those specifically exemplified can be employed in thepractice of the invention without resort to undue experimentation. Allart-known functional equivalents, of any such materials and methods areintended to be included in this invention. The terms and expressionswhich have been employed are used as terms of description and not oflimitation, and there is no intention that in the use of such terms andexpressions of excluding any equivalents of the features shown anddescribed or portions thereof, but it is recognized that variousmodifications are possible within the scope of the invention claimed.Thus, it should be understood that although the present invention hasbeen specifically disclosed by preferred embodiments and optionalfeatures, modification and variation of the concepts herein disclosedmay be resorted to by those skilled in the art, and that suchmodifications and variations are considered to be within the scope ofthis invention as defined by the appended claims.

1-22. (canceled)
 23. An electrode comprising: a. an electrode materialcomprising an active material; and b. a current collector assemblycomprising: i. a primary current collector element, wherein the primarycurrent collector element is the form of a layer; and ii. at least oneauxiliary current collector element selected from the group consistingof: a plurality of current collector layers, a plurality of currentcollector layer segments, a plurality of current collector rods andcombinations thereof; wherein the plurality of current collector layers,if present, are parallel with respect to each other, the plurality ofcurrent collector layer segments, if present, are parallel with respectto each other, and the plurality of current collector rods, if present,are parallel with respect to each other; wherein said at least oneauxiliary current collector element is in electronic communication withsaid primary current collector element.
 24. The electrode of claim 23,wherein said at least one auxiliary current collector element comprisesa combination of the plurality of current collector rods and theplurality of current collector layers, wherein each of said plurality ofcurrent collector rods is substantially perpendicular to said primarycurrent collector element, each of said plurality of current collectorlayers is substantially parallel to said primary current collectorelement, each of said plurality of current collector layers comprises afirst plurality of apertures and each of said plurality of currentcollector rods passes through at least one of said apertures of saidplurality of current collector layers; and wherein each aperture of eachof said plurality of current collector layers is aligned with anaperture of each of all other of said plurality of current collectorlayers.
 25. (canceled)
 26. The electrode of claim 24, wherein saidelectrode material comprises a plurality of layers comprising an activematerial, wherein each layer comprising an active material is separatedfrom each adjacent layer comprising an active material by one of saidplurality of current collector layers, each layer comprising an activematerial further comprises a second plurality of apertures and each ofsaid plurality of current collector rods passes through at least oneaperture of said second plurality of apertures of said plurality oflayers comprising an active material; wherein the plurality of layerscomprising an active material are parallel with respect to each other,and the second plurality of apertures are parallel with respect to eachother.
 27. (canceled)
 28. The electrode of claim 24, wherein said atleast one auxiliary current collector element further comprises theplurality of current collector layer segments, each of said plurality ofcurrent collector layer segments comprises a third plurality ofapertures and each of said plurality of current collector rods passesthrough at least one aperture of said third plurality of apertures ofsaid plurality of current collector layer segments; and wherein thethird plurality of apertures are parallel with respect to each other.29. (canceled)
 30. An electrochemical cell comprising: a. a firstelectrode according to claim 23; b. a second electrode; and c. anionically conducting and electronically insulating separator layerdisposed between the first and the second electrode.
 31. Anelectrochemical cell comprising: a. at least one of a first type ofmultilayered electrode of a first polarity comprising: i. a plurality oflayers of a first type comprising a first active material; ii. at leastone layer of a second type comprising an electrolyte; iii. at least onelayer of a third type comprising a current collector; wherein each layerof a first type is separated from each adjacent layer of a first type byat least one layer of a second type or at least one layer of a thirdtype; and wherein each of the layers of said at least one first type ofmultilayered electrode is independently provided along a layer alignmentaxis that is substantially parallel to an alignment axis of each otherlayers of said at least one first type of multilayered electrode; b. atleast one of a second type of multilayered electrode of a secondpolarity comprising: i. a plurality of layers of a fourth typecomprising a second active material; ii. at least one layer of a secondtype comprising an electrolyte; and iii. at least one layer of a thirdfifth type comprising a current collector; wherein each layer of afourth type is separated from each adjacent layer of a fourth type by atleast one layer of a second type or at least one layer of a fifth type;and wherein each of the layers of said at least one second type ofmultilayered electrode is independently provided along a layer alignmentaxis that is substantially parallel to an alignment axis of each otherlayers of said at least one second type of multilayered electrode; andc. an ionically conducting and electronically insulating separator layerdisposed between the at least one of the first type of multilayeredelectrode and the at least one of the second type of multilayeredelectrode.
 32. (canceled)
 33. The electrochemical cell of claim 31comprising a plurality of the first type of multilayered electrodes anda plurality of the second type of multilayered electrodes; wherein eachof the layers of said first type of multilayered electrodes and thesecond type of multilayered electrodes are independently provided alonglayer alignment axes that are substantially parallel to each other; andwherein the plurality of the first type of multilayered electrodes andthe second type of multilayered electrodes are provided in anorientation substantially parallel to each other. 34-35. (canceled) 36.The electrochemical cell of claim 31 comprising a plurality of the firsttype of multilayered electrodes and a plurality of the second type ofmultilayered electrodes; wherein each of the layers of said first typeof multilayered electrodes and the second type of multilayeredelectrodes are independently provided along layer alignment axes thatare substantially parallel to each other; and wherein the plurality ofthe first type of multilayered electrodes and the second type ofmultilayered electrodes are provided along an electrode alignment axisoriented substantially perpendicular to said layer alignment axes. 37.The electrochemical cell of claim 33, wherein a single, continuousseparator is provided between said plurality of the first type ofmultilayered electrodes and said plurality of the second type ofmultilayered electrodes. 38-43. (canceled)
 44. A method for assembling amultilayered electrode, the method comprising the steps of: a. stackingi. a plurality of layers of a first type comprising an active material;and ii. at least one layer of a second type comprising a spacer materialor a solid or gel electrolyte, wherein each layer of the first type isseparated from each adjacent layer of the first type by at least onelayer of the second type; b. when a carrier material, a spacer materialor a carrier material and a spacer material are present, introducing aliquid electrolyte into the carrier material, the spacer material or thecarrier material and the spacer material. 45-49. (canceled)
 50. Alayered electrode for an electrochemical cell comprising at least 2substantially parallel plates separated by a space, where the space isat least partially filled with a electrolyte.
 51. (canceled)
 52. Thelayered electrode of claim 50, wherein each of the plates has at leastone aperture that is substantially perpendicular to a plane parallel toplanes of the said plates, wherein said apertures extend substantiallythrough at least 2 of the said plates of the said layered electrode.53-59. (canceled)
 60. The layered electrode of claim 50, furthercomprising a current collector, wherein the current collector of thesaid layered electrode is composed of at least one base-plate and atleast one rod that are electronically connected, where said at least onebase-plate of the current collector is substantially parallel to theplane of the said electrode plates, and the said rod of the currentcollector is substantially perpendicular to the plates.
 61. (canceled)62. The layered electrode of claim 50, wherein the current collectorfurther comprises at least of one auxiliary plate, the at least of oneauxiliary plate being parallel to at least one base-plate andelectronically connected to at least one base-plate by at least one ofsaid rods.
 63. The electrochemical cell of claim 31, wherein theionically conducting and electronically insulating separator comprisesthe electrolyte.
 64. The electrochemical cell of claim 31, wherein saidlayers of the first type of the multilayered electrodes and said layersof the second type of the multilayered electrodes are substantiallyparallel to said ionically conducting and electronically insulatingseparator layer.
 65. The electrochemical cell of claim 31, wherein saidlayers of the first type of the multilayered electrodes and said layersof the second type of the multilayered electrodes are substantiallyperpendicular to said ionically conducting and electronically insulatingseparator layer.
 66. The electrochemical cell of claim 36, wherein asingle, continuous separator is provided between said plurality of thefirst type of multilayered electrodes and said plurality of the secondtype of multilayered electrodes.
 67. The method of claim 44, wherein thespacer material is porous.